diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 94b83f339..0db340d4c 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -8,8 +8,8 @@ on:
     branches: [ master ]
   pull_request:
     branches: [ master ]
-    
-concurrency: 
+
+concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
@@ -21,15 +21,15 @@ jobs:
       matrix:
        # os: [ubuntu-latest, macos-latest, windows-latest]
         os: [ubuntu-latest]
-        include: 
+        include:
         - os: ubuntu-latest
           path: ~/.cache/pip
-        #- os: macos-latest
+        #- os: macos-latest-xlarge
         #  path: ~/Library/Caches/pip
         #- os: windows-latest
         #  path: ~\AppData\Local\pip\Cache
-        python-version: [3.8, 3.9, '3.10']
-        
+        python-version: [3.8, 3.9, '3.10', 3.11]
+
 
     steps:
       - name: Checkout
diff --git a/jesse/indicators/alma.py b/jesse/indicators/alma.py
index 1b6381e7e..6623e2708 100644
--- a/jesse/indicators/alma.py
+++ b/jesse/indicators/alma.py
@@ -4,6 +4,7 @@
 
 from jesse.helpers import get_candle_source, slice_candles
 
+
 def alma(candles: np.ndarray, period: int = 9, sigma: float = 6.0, distribution_offset: float = 0.85,
          source_type: str = "close", sequential: bool = False) -> Union[
     float, np.ndarray]:
diff --git a/jesse/indicators/apo.py b/jesse/indicators/apo.py
index 048b21d59..1b4389d4a 100644
--- a/jesse/indicators/apo.py
+++ b/jesse/indicators/apo.py
@@ -1,9 +1,9 @@
 from typing import Union
 
 import numpy as np
-from jesse.indicators.ma import ma
 
 from jesse.helpers import get_candle_source, slice_candles
+from jesse.indicators.ma import ma
 
 
 def apo(candles: np.ndarray, fast_period: int = 12, slow_period: int = 26, matype: int = 0, source_type: str = "close",
diff --git a/jesse/indicators/bandpass.py b/jesse/indicators/bandpass.py
index 4f8b3e055..24967cf82 100644
--- a/jesse/indicators/bandpass.py
+++ b/jesse/indicators/bandpass.py
@@ -1,15 +1,12 @@
 from collections import namedtuple
 
 import numpy as np
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
-
-from .high_pass import high_pass_fast
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
+from .high_pass import high_pass_fast
+
 BandPass = namedtuple('BandPass', ['bp', 'bp_normalized', 'signal', 'trigger'])
 
 
@@ -49,7 +46,7 @@ def bandpass(candles: np.ndarray, period: int = 20, bandwidth: float = 0.3,  sou
         return BandPass(bp[-1], bp_normalized[-1], signal[-1], trigger[-1])
 
 
-@njit
+@njit(cache=True)
 def bp_fast(source, hp, alpha, beta):  # Function is compiled to machine code when called the first time
 
     bp = np.copy(hp)
diff --git a/jesse/indicators/bollinger_bands.py b/jesse/indicators/bollinger_bands.py
index fb419c84c..a95365e47 100644
--- a/jesse/indicators/bollinger_bands.py
+++ b/jesse/indicators/bollinger_bands.py
@@ -2,12 +2,12 @@
 
 import numpy as np
 import talib
+
+from jesse.helpers import get_candle_source, slice_candles
 from jesse.indicators.ma import ma
 from jesse.indicators.mean_ad import mean_ad
 from jesse.indicators.median_ad import median_ad
 
-from jesse.helpers import get_candle_source, slice_candles
-
 BollingerBands = namedtuple('BollingerBands', ['upperband', 'middleband', 'lowerband'])
 
 
diff --git a/jesse/indicators/bollinger_bands_width.py b/jesse/indicators/bollinger_bands_width.py
index 2a4b2c13b..3e1cea1a2 100644
--- a/jesse/indicators/bollinger_bands_width.py
+++ b/jesse/indicators/bollinger_bands_width.py
@@ -2,12 +2,12 @@
 
 import numpy as np
 import talib
+
+from jesse.helpers import get_candle_source, slice_candles
 from jesse.indicators.ma import ma
 from jesse.indicators.mean_ad import mean_ad
 from jesse.indicators.median_ad import median_ad
 
-from jesse.helpers import get_candle_source, slice_candles
-
 
 def bollinger_bands_width(candles: np.ndarray, period: int = 20, devup: float = 2, devdn: float = 2, matype: int = 0,
                     devtype: int = 0,
diff --git a/jesse/indicators/cfo.py b/jesse/indicators/cfo.py
index 258148457..3eb7a7bad 100644
--- a/jesse/indicators/cfo.py
+++ b/jesse/indicators/cfo.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def cfo(candles: np.ndarray, period: int = 14, scalar: float = 100, source_type: str = "close",
diff --git a/jesse/indicators/cg.py b/jesse/indicators/cg.py
index 81ba6b928..2c9b6d3b4 100644
--- a/jesse/indicators/cg.py
+++ b/jesse/indicators/cg.py
@@ -1,10 +1,7 @@
 from typing import Union
 
 import numpy as np
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
 from jesse.helpers import get_candle_source, same_length, slice_candles
 
@@ -29,7 +26,7 @@ def cg(candles: np.ndarray, period: int = 10, source_type: str = "close", sequen
     return same_length(candles, res) if sequential else res[-1]
 
 
-@njit
+@njit(cache=True)
 def go_fast(source, period):  # Function is compiled to machine code when called the first time
     res = np.full_like(source, fill_value=np.nan)
     for i in range(source.size):
diff --git a/jesse/indicators/cksp.py b/jesse/indicators/cksp.py
index 1fba11e4a..b8317a7fe 100644
--- a/jesse/indicators/cksp.py
+++ b/jesse/indicators/cksp.py
@@ -5,7 +5,6 @@
 
 from jesse.helpers import slice_candles
 
-
 CKSP = namedtuple('CKSP', ['long', 'short'])
 
 def cksp(candles: np.ndarray, p: int = 10, x: float = 1.0,  q: int = 9, sequential: bool = False) -> CKSP:
diff --git a/jesse/indicators/cmo.py b/jesse/indicators/cmo.py
index a9a3c36ea..d32d82363 100644
--- a/jesse/indicators/cmo.py
+++ b/jesse/indicators/cmo.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def cmo(candles: np.ndarray, period: int = 14, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/correlation_cycle.py b/jesse/indicators/correlation_cycle.py
index 2ce557581..cd5d39622 100644
--- a/jesse/indicators/correlation_cycle.py
+++ b/jesse/indicators/correlation_cycle.py
@@ -1,10 +1,7 @@
 from collections import namedtuple
 
 import numpy as np
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
 from jesse.helpers import get_candle_source, np_shift, slice_candles
 
@@ -42,7 +39,7 @@ def correlation_cycle(candles: np.ndarray, period: int = 20, threshold: int = 9,
         return CC(realPart[-1], imagPart[-1], angle[-1], state[-1])
 
 
-@njit
+@njit(cache=True)
 def go_fast(source, period):  # Function is compiled to machine code when called the first time
     # Correlation Cycle Function
     PIx2 = 4.0 * np.arcsin(1.0)
diff --git a/jesse/indicators/cvi.py b/jesse/indicators/cvi.py
index 3a0cc6ecd..1bc940d33 100644
--- a/jesse/indicators/cvi.py
+++ b/jesse/indicators/cvi.py
@@ -3,7 +3,7 @@
 import numpy as np
 import tulipy as ti
 
-from jesse.helpers import slice_candles, same_length
+from jesse.helpers import same_length, slice_candles
 
 
 def cvi(candles: np.ndarray, period: int = 5, sequential: bool = False) -> Union[float, np.ndarray]:
diff --git a/jesse/indicators/cwma.py b/jesse/indicators/cwma.py
index eeb5c5396..8117ca18e 100644
--- a/jesse/indicators/cwma.py
+++ b/jesse/indicators/cwma.py
@@ -1,11 +1,7 @@
 from typing import Union
-import numpy as np
-
 
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+import numpy as np
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
@@ -35,7 +31,7 @@ def cwma(candles: np.ndarray, period: int = 14, source_type: str = "close", sequ
     return res if sequential else res[-1]
 
 
-@njit
+@njit(cache=True)
 def vpwma_fast(source, period):
     newseries = np.copy(source)
     for j in range(period + 1, source.shape[0]):
diff --git a/jesse/indicators/damiani_volatmeter.py b/jesse/indicators/damiani_volatmeter.py
index 856ce19a2..eea44cca5 100644
--- a/jesse/indicators/damiani_volatmeter.py
+++ b/jesse/indicators/damiani_volatmeter.py
@@ -2,13 +2,9 @@
 
 import numpy as np
 import talib
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 DamianiVolatmeter = namedtuple('DamianiVolatmeter', ['vol', 'anti'])
 
@@ -46,7 +42,7 @@ def damiani_volatmeter(candles: np.ndarray, vis_atr: int = 13, vis_std: int = 20
         return DamianiVolatmeter(vol[-1], t[-1])
 
 
-@njit
+@njit(cache=True)
 def damiani_volatmeter_fast(source, sed_std, atrvis, atrsed, vis_std,
                             threshold):  # Function is compiled to machine code when called the first time
     lag_s = 0.5
diff --git a/jesse/indicators/dec_osc.py b/jesse/indicators/dec_osc.py
index 517a6243f..00514ba6f 100644
--- a/jesse/indicators/dec_osc.py
+++ b/jesse/indicators/dec_osc.py
@@ -3,6 +3,7 @@
 import numpy as np
 
 from jesse.helpers import get_candle_source, slice_candles
+
 from .high_pass_2_pole import high_pass_2_pole_fast
 
 
diff --git a/jesse/indicators/decycler.py b/jesse/indicators/decycler.py
index a5ebe1293..e532ca67c 100644
--- a/jesse/indicators/decycler.py
+++ b/jesse/indicators/decycler.py
@@ -3,6 +3,7 @@
 import numpy as np
 
 from jesse.helpers import get_candle_source, slice_candles
+
 from .high_pass_2_pole import high_pass_2_pole_fast
 
 
diff --git a/jesse/indicators/devstop.py b/jesse/indicators/devstop.py
index 0f50f9e40..049523e14 100644
--- a/jesse/indicators/devstop.py
+++ b/jesse/indicators/devstop.py
@@ -2,10 +2,10 @@
 
 import numpy as np
 import talib
-from jesse.indicators.mean_ad import mean_ad
-from jesse.indicators.median_ad import median_ad
 
 from jesse.helpers import slice_candles
+from jesse.indicators.mean_ad import mean_ad
+from jesse.indicators.median_ad import median_ad
 
 
 def devstop(candles: np.ndarray, period: int = 20, mult: float = 0, devtype: int = 0, direction: str = "long",
diff --git a/jesse/indicators/edcf.py b/jesse/indicators/edcf.py
index bd23e3957..5f92ccb05 100644
--- a/jesse/indicators/edcf.py
+++ b/jesse/indicators/edcf.py
@@ -1,11 +1,7 @@
 from typing import Union
 
 import numpy as np
-
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a: a
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
@@ -35,7 +31,7 @@ def edcf(candles: np.ndarray, period: int = 15, source_type: str = "hl2", sequen
     return res if sequential else res[-1]
 
 
-@njit
+@njit(cache=True)
 def edcf_fast(source, period):
     newseries = np.full_like(source, np.nan)
 
diff --git a/jesse/indicators/efi.py b/jesse/indicators/efi.py
index ba1677227..544908241 100644
--- a/jesse/indicators/efi.py
+++ b/jesse/indicators/efi.py
@@ -2,10 +2,7 @@
 
 import numpy as np
 import talib
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
 from jesse.helpers import get_candle_source, same_length, slice_candles
 
@@ -34,7 +31,7 @@ def efi(candles: np.ndarray, period: int = 13, source_type: str = "close", seque
     return res_with_nan if sequential else res_with_nan[-1]
 
 
-@njit
+@njit(cache=True)
 def efi_fast(source, volume):
     dif = np.zeros(source.size - 1)
     for i in range(1, source.size):
diff --git a/jesse/indicators/emd.py b/jesse/indicators/emd.py
index 8ed48611d..a9e739753 100644
--- a/jesse/indicators/emd.py
+++ b/jesse/indicators/emd.py
@@ -2,10 +2,7 @@
 
 import numpy as np
 import talib
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
 from jesse.helpers import slice_candles
 
@@ -42,7 +39,7 @@ def emd(candles: np.ndarray, period: int = 20, delta=0.5, fraction=0.1, sequenti
         return EMD(avg_peak[-1], mean[-1], avg_valley[-1])
 
 
-@njit
+@njit(cache=True)
 def bp_fast(price, period, delta):
     # bandpass filter
     beta = np.cos(2 * np.pi / period)
@@ -58,7 +55,7 @@ def bp_fast(price, period, delta):
     return bp
 
 
-@njit
+@njit(cache=True)
 def peak_valley_fast(bp, price):
     peak = np.copy(bp)
     valley = np.copy(bp)
diff --git a/jesse/indicators/emv.py b/jesse/indicators/emv.py
index 1173b33f3..0995d5a82 100644
--- a/jesse/indicators/emv.py
+++ b/jesse/indicators/emv.py
@@ -3,7 +3,7 @@
 import numpy as np
 import tulipy as ti
 
-from jesse.helpers import slice_candles, same_length
+from jesse.helpers import same_length, slice_candles
 
 
 def emv(candles: np.ndarray, sequential: bool = False) -> Union[float, np.ndarray]:
diff --git a/jesse/indicators/epma.py b/jesse/indicators/epma.py
index f19e73b7e..605c54db8 100644
--- a/jesse/indicators/epma.py
+++ b/jesse/indicators/epma.py
@@ -1,11 +1,7 @@
 from typing import Union
-import numpy as np
-
 
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+import numpy as np
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
@@ -36,7 +32,7 @@ def epma(candles: np.ndarray, period: int = 11, offset: int = 4, source_type: st
     return res if sequential else res[-1]
 
 
-@njit
+@njit(cache=True)
 def epma_fast(source, period, offset):
     newseries = np.copy(source)
     for j in range(period + offset + 1 , source.shape[0]):
diff --git a/jesse/indicators/er.py b/jesse/indicators/er.py
index 815cc852c..3ccd341b7 100644
--- a/jesse/indicators/er.py
+++ b/jesse/indicators/er.py
@@ -3,7 +3,7 @@
 import numpy as np
 from numpy.lib.stride_tricks import sliding_window_view
 
-from jesse.helpers import get_candle_source, slice_candles, same_length
+from jesse.helpers import get_candle_source, same_length, slice_candles
 
 
 def er(candles: np.ndarray, period: int = 5, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/eri.py b/jesse/indicators/eri.py
index 2107d09f1..7faccda1b 100644
--- a/jesse/indicators/eri.py
+++ b/jesse/indicators/eri.py
@@ -1,9 +1,9 @@
 from collections import namedtuple
 
 import numpy as np
-from jesse.indicators.ma import ma
 
 from jesse.helpers import get_candle_source, slice_candles
+from jesse.indicators.ma import ma
 
 ERI = namedtuple('ERI', ['bull', 'bear'])
 
diff --git a/jesse/indicators/fisher.py b/jesse/indicators/fisher.py
index 0ea7e8a81..f4710e873 100644
--- a/jesse/indicators/fisher.py
+++ b/jesse/indicators/fisher.py
@@ -3,7 +3,7 @@
 import numpy as np
 import tulipy as ti
 
-from jesse.helpers import slice_candles, same_length
+from jesse.helpers import same_length, slice_candles
 
 FisherTransform = namedtuple('FisherTransform', ['fisher', 'signal'])
 
diff --git a/jesse/indicators/frama.py b/jesse/indicators/frama.py
index 9191d09d2..92b05005d 100644
--- a/jesse/indicators/frama.py
+++ b/jesse/indicators/frama.py
@@ -1,10 +1,7 @@
 from typing import Union
 
 import numpy as np
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
 from jesse.helpers import slice_candles
 
@@ -39,7 +36,7 @@ def frama(candles: np.ndarray, window: int = 10, FC: int = 1, SC: int = 300, seq
         return res[-1]
 
 
-@njit
+@njit(cache=True)
 def frame_fast(candles, n, SC, FC):
     w = np.log(2.0 / (SC + 1))
 
diff --git a/jesse/indicators/fwma.py b/jesse/indicators/fwma.py
index f52d62e79..4340a9e6e 100644
--- a/jesse/indicators/fwma.py
+++ b/jesse/indicators/fwma.py
@@ -4,7 +4,7 @@
 import numpy as np
 from numpy.lib.stride_tricks import sliding_window_view
 
-from jesse.helpers import get_candle_source, slice_candles, same_length
+from jesse.helpers import get_candle_source, same_length, slice_candles
 
 
 def fwma(candles: np.ndarray, period: int = 5, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/gatorosc.py b/jesse/indicators/gatorosc.py
index f73e9c93e..e154899f2 100644
--- a/jesse/indicators/gatorosc.py
+++ b/jesse/indicators/gatorosc.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source, np_shift
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, np_shift, slice_candles
 
 GATOR = namedtuple('GATOR', ['upper', 'lower', 'upper_change', 'lower_change'])
 
diff --git a/jesse/indicators/gauss.py b/jesse/indicators/gauss.py
index 799465477..820b97b2b 100644
--- a/jesse/indicators/gauss.py
+++ b/jesse/indicators/gauss.py
@@ -1,10 +1,7 @@
 from typing import Union
 
 import numpy as np
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
@@ -39,7 +36,7 @@ def gauss(candles: np.ndarray, period: int = 14, poles: int = 4, source_type: st
     return res if sequential else res[-1]
 
 
-@njit
+@njit(cache=True)
 def gauss_fast(source, period, poles):
     N = source.size
     source = source[~np.isnan(source)]
diff --git a/jesse/indicators/heikin_ashi_candles.py b/jesse/indicators/heikin_ashi_candles.py
index 0e874c29c..a66955ff9 100755
--- a/jesse/indicators/heikin_ashi_candles.py
+++ b/jesse/indicators/heikin_ashi_candles.py
@@ -1,11 +1,9 @@
-import numpy as np
 from collections import namedtuple
-from jesse.helpers import slice_candles
 
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+import numpy as np
+from numba import njit
+
+from jesse.helpers import slice_candles
 
 HA = namedtuple('HA', ['open', 'close', 'high', 'low'])
 
@@ -26,7 +24,7 @@ def heikin_ashi_candles(candles: np.ndarray, sequential: bool = False) -> HA:
     else:
         return HA(open[-1], close[-1], high[-1], low[-1])
 
-@njit
+@njit(cache=True)
 def ha_fast(source):
 
     # index consts to facilitate reading the code
@@ -44,8 +42,8 @@ def ha_fast(source):
         ha_candles[i][CLOSE] = (source[i][OPEN]+source[i][CLOSE]+source[i][HIGH]+source[i][LOW])/4
         # Using builtins Python min,max and not numpy one since we get this Error:
         # No implementation of function Function() found for signature:
-        # Still fast since numba supports it 
+        # Still fast since numba supports it
         ha_candles[i][HIGH] = max([source[i][HIGH], ha_candles[i][OPEN], ha_candles[i][CLOSE]])
         ha_candles[i][LOW] = min([source[i][LOW], ha_candles[i][OPEN], ha_candles[i][CLOSE]])
 
-    return ha_candles[:,OPEN], ha_candles[:,CLOSE], ha_candles[:,HIGH], ha_candles[:,LOW]
\ No newline at end of file
+    return ha_candles[:,OPEN], ha_candles[:,CLOSE], ha_candles[:,HIGH], ha_candles[:,LOW]
diff --git a/jesse/indicators/high_pass.py b/jesse/indicators/high_pass.py
index e66451474..55c1f6feb 100644
--- a/jesse/indicators/high_pass.py
+++ b/jesse/indicators/high_pass.py
@@ -1,10 +1,7 @@
 from typing import Union
 
 import numpy as np
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
@@ -36,7 +33,7 @@ def high_pass(candles: np.ndarray, period: int = 48, source_type: str = "close",
         return None if np.isnan(hpf[-1]) else hpf[-1]
 
 
-@njit
+@njit(cache=True)
 def high_pass_fast(source, period):  # Function is compiled to machine code when called the first time
     k = 1
     alpha = 1 + (np.sin(2 * np.pi * k / period) - 1) / np.cos(2 * np.pi * k / period)
diff --git a/jesse/indicators/high_pass_2_pole.py b/jesse/indicators/high_pass_2_pole.py
index 68b8f41f4..a9d3c16bd 100644
--- a/jesse/indicators/high_pass_2_pole.py
+++ b/jesse/indicators/high_pass_2_pole.py
@@ -1,10 +1,7 @@
 from typing import Union
 
 import numpy as np
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
@@ -37,7 +34,7 @@ def high_pass_2_pole(candles: np.ndarray, period: int = 48, source_type: str = "
         return None if np.isnan(hpf[-1]) else hpf[-1]
 
 
-@njit
+@njit(cache=True)
 def high_pass_2_pole_fast(source, period, K=0.707):  # Function is compiled to machine code when called the first time
     alpha = 1 + (np.sin(2 * np.pi * K / period) - 1) / np.cos(2 * np.pi * K / period)
     newseries = np.copy(source)
diff --git a/jesse/indicators/ht_dcperiod.py b/jesse/indicators/ht_dcperiod.py
index 3880fe4f7..d798cc7a8 100644
--- a/jesse/indicators/ht_dcperiod.py
+++ b/jesse/indicators/ht_dcperiod.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def ht_dcperiod(candles: np.ndarray, source_type: str = "close", sequential: bool = False) -> Union[float, np.ndarray]:
diff --git a/jesse/indicators/ht_dcphase.py b/jesse/indicators/ht_dcphase.py
index 1e291b117..0adb21319 100644
--- a/jesse/indicators/ht_dcphase.py
+++ b/jesse/indicators/ht_dcphase.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def ht_dcphase(candles: np.ndarray, source_type: str = "close", sequential: bool = False) -> Union[float, np.ndarray]:
diff --git a/jesse/indicators/ht_phasor.py b/jesse/indicators/ht_phasor.py
index a85f2beda..2dccb3a8c 100644
--- a/jesse/indicators/ht_phasor.py
+++ b/jesse/indicators/ht_phasor.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 IQ = namedtuple('IQ', ['inphase', 'quadrature'])
 
diff --git a/jesse/indicators/ht_sine.py b/jesse/indicators/ht_sine.py
index c45535ba0..1518481ee 100644
--- a/jesse/indicators/ht_sine.py
+++ b/jesse/indicators/ht_sine.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 SINEWAVE = namedtuple('SINEWAVE', ['sine', 'lead'])
 
diff --git a/jesse/indicators/ht_trendline.py b/jesse/indicators/ht_trendline.py
index a4a4bd41f..da5d32817 100644
--- a/jesse/indicators/ht_trendline.py
+++ b/jesse/indicators/ht_trendline.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def ht_trendline(candles: np.ndarray, source_type: str = "close", sequential: bool = False) -> Union[float, np.ndarray]:
diff --git a/jesse/indicators/ht_trendmode.py b/jesse/indicators/ht_trendmode.py
index 96e66fbe0..4f0003527 100644
--- a/jesse/indicators/ht_trendmode.py
+++ b/jesse/indicators/ht_trendmode.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def ht_trendmode(candles: np.ndarray, source_type: str = "close", sequential: bool = False) -> Union[float, np.ndarray]:
diff --git a/jesse/indicators/hurst_exponent.py b/jesse/indicators/hurst_exponent.py
index c6e57e19b..41400bb5d 100644
--- a/jesse/indicators/hurst_exponent.py
+++ b/jesse/indicators/hurst_exponent.py
@@ -1,12 +1,9 @@
 import numpy as np
-
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
+from scipy import signal
 
 from jesse.helpers import get_candle_source, slice_candles
-from scipy import signal
+
 
 def hurst_exponent(candles: np.ndarray, min_chunksize: int = 8, max_chunksize: int = 200, num_chunksize:int=5, method:int=1, source_type: str = "close") -> float:
     """
@@ -40,7 +37,7 @@ def hurst_exponent(candles: np.ndarray, min_chunksize: int = 8, max_chunksize: i
     return None if np.isnan(h) else h
 
 
-@njit
+@njit(cache=True)
 def hurst_rs(x, min_chunksize, max_chunksize, num_chunksize):
     """Estimate the Hurst exponent using R/S method.
     Estimates the Hurst (H) exponent using the R/S method from the time series.
diff --git a/jesse/indicators/hwma.py b/jesse/indicators/hwma.py
index ec989e72a..e25366926 100644
--- a/jesse/indicators/hwma.py
+++ b/jesse/indicators/hwma.py
@@ -1,12 +1,9 @@
 from typing import Union
 
 import numpy as np
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
-from jesse.helpers import get_candle_source, slice_candles, same_length
+from jesse.helpers import get_candle_source, same_length, slice_candles
 
 
 def hwma(candles: np.ndarray, na: float = 0.2, nb: float = 0.1, nc: float = 0.1, source_type: str = "close", sequential: bool = False) -> Union[
@@ -40,7 +37,7 @@ def hwma(candles: np.ndarray, na: float = 0.2, nb: float = 0.1, nc: float = 0.1,
     return res if sequential else res[-1]
 
 
-@njit
+@njit(cache=True)
 def hwma_fast(source, na, nb, nc):
     last_a = last_v = 0
     last_f = source[0]
diff --git a/jesse/indicators/ichimoku_cloud_seq.py b/jesse/indicators/ichimoku_cloud_seq.py
index 01bbcc6b0..f78b20b59 100644
--- a/jesse/indicators/ichimoku_cloud_seq.py
+++ b/jesse/indicators/ichimoku_cloud_seq.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import np_shift
-from jesse.helpers import slice_candles
+from jesse.helpers import np_shift, slice_candles
 
 IchimokuCloud = namedtuple('IchimokuCloud',
                            ['conversion_line', 'base_line', 'span_a', 'span_b', 'lagging_line', 'future_span_a',
diff --git a/jesse/indicators/ift_rsi.py b/jesse/indicators/ift_rsi.py
index fe999186c..3f296a07f 100644
--- a/jesse/indicators/ift_rsi.py
+++ b/jesse/indicators/ift_rsi.py
@@ -1,9 +1,9 @@
 from typing import Union
-import talib
 
 import numpy as np
+import talib
 
-from jesse.helpers import get_candle_source, slice_candles, same_length
+from jesse.helpers import get_candle_source, same_length, slice_candles
 
 
 def ift_rsi(candles: np.ndarray, rsi_period: int = 5, wma_period: int =9, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/itrend.py b/jesse/indicators/itrend.py
index ee8fe0f2a..85c3a1279 100644
--- a/jesse/indicators/itrend.py
+++ b/jesse/indicators/itrend.py
@@ -1,10 +1,7 @@
 from collections import namedtuple
 
 import numpy as np
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
@@ -34,7 +31,7 @@ def itrend(candles: np.ndarray, alpha: float = 0.07, source_type: str = "hl2", s
         return ITREND(signal[-1], it[-1], trigger[-1])
 
 
-@njit
+@njit(cache=True)
 def itrend_fast(source, alpha):
     it = np.copy(source)
     for i in range(2, 7):
diff --git a/jesse/indicators/jma.py b/jesse/indicators/jma.py
index 67cd83c9b..5eec83901 100644
--- a/jesse/indicators/jma.py
+++ b/jesse/indicators/jma.py
@@ -1,10 +1,7 @@
 from typing import Union
 
 import numpy as np
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
@@ -31,7 +28,7 @@ def jma(candles: np.ndarray, period:int=7, phase:float=50, power:int=2, source_t
     return res if sequential else res[-1]
 
 
-@njit
+@njit(cache=True)
 def jma_helper(src, phaseRatio, beta, alpha):
     jma_val = np.copy(src)
 
diff --git a/jesse/indicators/jsa.py b/jesse/indicators/jsa.py
index e9c49e09f..ebda46d08 100644
--- a/jesse/indicators/jsa.py
+++ b/jesse/indicators/jsa.py
@@ -2,7 +2,7 @@
 
 import numpy as np
 
-from jesse.helpers import get_candle_source, slice_candles, np_shift
+from jesse.helpers import get_candle_source, np_shift, slice_candles
 
 
 def jsa(candles: np.ndarray, period: int = 30, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/kama.py b/jesse/indicators/kama.py
index 5b539b2b6..dff02c8c8 100644
--- a/jesse/indicators/kama.py
+++ b/jesse/indicators/kama.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def kama(candles: np.ndarray, period: int = 30, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/kaufmanstop.py b/jesse/indicators/kaufmanstop.py
index c1f3efdc0..4e98f1613 100644
--- a/jesse/indicators/kaufmanstop.py
+++ b/jesse/indicators/kaufmanstop.py
@@ -2,8 +2,8 @@
 
 import numpy as np
 
-from jesse.indicators.ma import ma
 from jesse.helpers import slice_candles
+from jesse.indicators.ma import ma
 
 
 def kaufmanstop(candles: np.ndarray, period: int = 22, mult: float = 2, direction: str = "long", matype: int = 0,
diff --git a/jesse/indicators/kdj.py b/jesse/indicators/kdj.py
index 49d66cc8a..6222f5c5a 100644
--- a/jesse/indicators/kdj.py
+++ b/jesse/indicators/kdj.py
@@ -2,9 +2,9 @@
 
 import numpy as np
 import talib
-from jesse.indicators.ma import ma
 
 from jesse.helpers import slice_candles
+from jesse.indicators.ma import ma
 
 KDJ = namedtuple('KDJ', ['k', 'd', 'j'])
 
diff --git a/jesse/indicators/keltner.py b/jesse/indicators/keltner.py
index eabed9e62..a8f807800 100644
--- a/jesse/indicators/keltner.py
+++ b/jesse/indicators/keltner.py
@@ -3,11 +3,9 @@
 import numpy as np
 import talib
 
+from jesse.helpers import get_candle_source, slice_candles
 from jesse.indicators.ma import ma
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
-
 KeltnerChannel = namedtuple('KeltnerChannel', ['upperband', 'middleband', 'lowerband'])
 
 
diff --git a/jesse/indicators/kst.py b/jesse/indicators/kst.py
index c5bacf1ba..d83b97a44 100644
--- a/jesse/indicators/kst.py
+++ b/jesse/indicators/kst.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 KST = namedtuple('KST', ['line', 'signal'])
 
diff --git a/jesse/indicators/kurtosis.py b/jesse/indicators/kurtosis.py
index 6a5eafa45..ea10480c9 100644
--- a/jesse/indicators/kurtosis.py
+++ b/jesse/indicators/kurtosis.py
@@ -1,10 +1,10 @@
 from typing import Union
 
 import numpy as np
-from scipy import stats
 from numpy.lib.stride_tricks import sliding_window_view
+from scipy import stats
 
-from jesse.helpers import get_candle_source, slice_candles, same_length
+from jesse.helpers import get_candle_source, same_length, slice_candles
 
 
 def kurtosis(candles: np.ndarray, period: int = 5, source_type: str = "hl2", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/kvo.py b/jesse/indicators/kvo.py
index 52bf32547..2f658df12 100644
--- a/jesse/indicators/kvo.py
+++ b/jesse/indicators/kvo.py
@@ -3,7 +3,7 @@
 import numpy as np
 import tulipy as ti
 
-from jesse.helpers import slice_candles, same_length
+from jesse.helpers import same_length, slice_candles
 
 
 def kvo(candles: np.ndarray, short_period: int = 2, long_period: int = 5, sequential: bool = False) -> Union[
diff --git a/jesse/indicators/linearreg.py b/jesse/indicators/linearreg.py
index 481aa82a8..af51592d4 100644
--- a/jesse/indicators/linearreg.py
+++ b/jesse/indicators/linearreg.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def linearreg(candles: np.ndarray, period: int = 14, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/linearreg_angle.py b/jesse/indicators/linearreg_angle.py
index 05abe5b98..d1d782859 100644
--- a/jesse/indicators/linearreg_angle.py
+++ b/jesse/indicators/linearreg_angle.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def linearreg_angle(candles: np.ndarray, period: int = 14, source_type: str = "close", sequential: bool = False) -> \
diff --git a/jesse/indicators/linearreg_intercept.py b/jesse/indicators/linearreg_intercept.py
index 7038d2a06..15b363a8a 100644
--- a/jesse/indicators/linearreg_intercept.py
+++ b/jesse/indicators/linearreg_intercept.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def linearreg_intercept(candles: np.ndarray, period: int = 14, source_type: str = "close", sequential: bool = False) -> \
diff --git a/jesse/indicators/linearreg_slope.py b/jesse/indicators/linearreg_slope.py
index 8f920df82..cabeee40b 100644
--- a/jesse/indicators/linearreg_slope.py
+++ b/jesse/indicators/linearreg_slope.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def linearreg_slope(candles: np.ndarray, period: int = 14, source_type: str = "close", sequential: bool = False) -> \
diff --git a/jesse/indicators/lrsi.py b/jesse/indicators/lrsi.py
index 5b9d46bee..a013ed0ff 100644
--- a/jesse/indicators/lrsi.py
+++ b/jesse/indicators/lrsi.py
@@ -1,10 +1,7 @@
 from typing import Union
 
 import numpy as np
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
 from jesse.helpers import slice_candles
 
@@ -29,7 +26,7 @@ def lrsi(candles: np.ndarray, alpha: float = 0.2, sequential: bool = False) -> U
         return None if np.isnan(rsi[-1]) else rsi[-1]
 
 
-@njit
+@njit(cache=True)
 def lrsi_fast(alpha, candles):
     price = (candles[:, 3] + candles[:, 4]) / 2
     l0 = np.copy(price)
diff --git a/jesse/indicators/maaq.py b/jesse/indicators/maaq.py
index 98e8aa50c..fff64da5c 100644
--- a/jesse/indicators/maaq.py
+++ b/jesse/indicators/maaq.py
@@ -1,13 +1,11 @@
 from typing import Union
-import talib
-import numpy as np
 
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a: a
+import numpy as np
+import talib
+from numba import njit
 
-from jesse.helpers import get_candle_source, slice_candles, np_shift, same_length
+from jesse.helpers import (get_candle_source, np_shift, same_length,
+                           slice_candles)
 
 
 def maaq(candles: np.ndarray, period: int = 11, fast_period: int = 2, slow_period: int = 30, source_type: str = "close", sequential: bool = False) -> Union[float, np.ndarray]:
@@ -50,7 +48,7 @@ def maaq(candles: np.ndarray, period: int = 11, fast_period: int = 2, slow_perio
     return res if sequential else res[-1]
 
 
-@njit
+@njit(cache=True)
 def maaq_fast(source, temp, period):
     newseries = np.copy(source)
     for i in range(period, source.shape[0]):
diff --git a/jesse/indicators/mab.py b/jesse/indicators/mab.py
index 20eda98e0..fac1bb796 100644
--- a/jesse/indicators/mab.py
+++ b/jesse/indicators/mab.py
@@ -2,10 +2,9 @@
 
 import numpy as np
 import talib
-from jesse.indicators.ma import ma
-
 
 from jesse.helpers import get_candle_source, slice_candles
+from jesse.indicators.ma import ma
 
 MAB = namedtuple('MAB', ['upperband', 'middleband', 'lowerband'])
 
diff --git a/jesse/indicators/macd.py b/jesse/indicators/macd.py
index 5d47bb556..5207b5f5b 100644
--- a/jesse/indicators/macd.py
+++ b/jesse/indicators/macd.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 MACD = namedtuple('MACD', ['macd', 'signal', 'hist'])
 
diff --git a/jesse/indicators/macdext.py b/jesse/indicators/macdext.py
index cfc63d03d..29498ea31 100644
--- a/jesse/indicators/macdext.py
+++ b/jesse/indicators/macdext.py
@@ -2,7 +2,7 @@
 
 import numpy as np
 
-from jesse.helpers import get_candle_source, slice_candles, same_length
+from jesse.helpers import get_candle_source, same_length, slice_candles
 from jesse.indicators.ma import ma
 
 MACDEXT = namedtuple('MACDEXT', ['macd', 'signal', 'hist'])
diff --git a/jesse/indicators/mama.py b/jesse/indicators/mama.py
index c8c8f8f7e..4bac153a9 100644
--- a/jesse/indicators/mama.py
+++ b/jesse/indicators/mama.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 MAMA = namedtuple('MAMA', ['mama', 'fama'])
 
diff --git a/jesse/indicators/marketfi.py b/jesse/indicators/marketfi.py
index dc830e4d4..b12b7c2a0 100644
--- a/jesse/indicators/marketfi.py
+++ b/jesse/indicators/marketfi.py
@@ -3,8 +3,7 @@
 import numpy as np
 import tulipy as ti
 
-from jesse.helpers import same_length
-from jesse.helpers import slice_candles
+from jesse.helpers import same_length, slice_candles
 
 
 def marketfi(candles: np.ndarray, sequential: bool = False) -> Union[float, np.ndarray]:
diff --git a/jesse/indicators/mass.py b/jesse/indicators/mass.py
index 80d785a1b..cfd457476 100644
--- a/jesse/indicators/mass.py
+++ b/jesse/indicators/mass.py
@@ -3,7 +3,7 @@
 import numpy as np
 import tulipy as ti
 
-from jesse.helpers import slice_candles, same_length
+from jesse.helpers import same_length, slice_candles
 
 
 def mass(candles: np.ndarray, period: int = 5, sequential: bool = False) -> Union[float, np.ndarray]:
diff --git a/jesse/indicators/mcginley_dynamic.py b/jesse/indicators/mcginley_dynamic.py
index 3871d6450..2eeccb239 100644
--- a/jesse/indicators/mcginley_dynamic.py
+++ b/jesse/indicators/mcginley_dynamic.py
@@ -1,10 +1,7 @@
 from typing import Union
 
 import numpy as np
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
@@ -36,7 +33,7 @@ def mcginley_dynamic(candles: np.ndarray, period: int = 10, k: float = 0.6, sour
     return mg if sequential else mg[-1]
 
 
-@njit
+@njit(cache=True)
 def md_fast(source, k, period):
     mg = np.full_like(source, np.nan)
     for i in range(source.size):
diff --git a/jesse/indicators/mean_ad.py b/jesse/indicators/mean_ad.py
index a8cf7a64f..4e79e87df 100644
--- a/jesse/indicators/mean_ad.py
+++ b/jesse/indicators/mean_ad.py
@@ -2,7 +2,8 @@
 
 import numpy as np
 from numpy.lib.stride_tricks import sliding_window_view
-from jesse.helpers import get_candle_source, slice_candles, same_length
+
+from jesse.helpers import get_candle_source, same_length, slice_candles
 
 
 def mean_ad(candles: np.ndarray, period: int = 5, source_type: str = "hl2", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/median_ad.py b/jesse/indicators/median_ad.py
index f9524abd0..3c75577b1 100644
--- a/jesse/indicators/median_ad.py
+++ b/jesse/indicators/median_ad.py
@@ -1,10 +1,10 @@
 from typing import Union
 
 import numpy as np
-from scipy import stats
 from numpy.lib.stride_tricks import sliding_window_view
+from scipy import stats
 
-from jesse.helpers import get_candle_source, slice_candles, same_length
+from jesse.helpers import get_candle_source, same_length, slice_candles
 
 
 def median_ad(candles: np.ndarray, period: int = 5, source_type: str = "hl2", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/midpoint.py b/jesse/indicators/midpoint.py
index b91e16876..a12ff33f7 100644
--- a/jesse/indicators/midpoint.py
+++ b/jesse/indicators/midpoint.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def midpoint(candles: np.ndarray, period: int = 14, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/mom.py b/jesse/indicators/mom.py
index 2b4db1f27..f2c18ffb6 100644
--- a/jesse/indicators/mom.py
+++ b/jesse/indicators/mom.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def mom(candles: np.ndarray, period: int = 10, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/mwdx.py b/jesse/indicators/mwdx.py
index ffa7664f5..5e4de2ff5 100644
--- a/jesse/indicators/mwdx.py
+++ b/jesse/indicators/mwdx.py
@@ -1,11 +1,7 @@
 from typing import Union
 
 import numpy as np
-
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a: a
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
@@ -38,7 +34,7 @@ def mwdx(candles: np.ndarray, factor: float = 0.2, source_type: str = "close", s
     return res if sequential else res[-1]
 
 
-@njit
+@njit(cache=True)
 def mwdx_fast(source, fac):
     newseries = np.copy(source)
     for i in range(1, source.shape[0]):
diff --git a/jesse/indicators/nma.py b/jesse/indicators/nma.py
index 9b418dc27..7c47e156b 100644
--- a/jesse/indicators/nma.py
+++ b/jesse/indicators/nma.py
@@ -1,10 +1,7 @@
 from typing import Union
-import numpy as np
 
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a: a
+import numpy as np
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
@@ -32,7 +29,7 @@ def nma(candles: np.ndarray, period: int = 40, source_type: str = "close", seque
 
     return res if sequential else res[-1]
 
-@njit
+@njit(cache=True)
 def nma_fast(source, period):
     # Ensure source values are positive before taking log
     source = np.clip(source, a_min=1e-10, a_max=None)
diff --git a/jesse/indicators/nvi.py b/jesse/indicators/nvi.py
index f96526df5..7a6c4ec63 100644
--- a/jesse/indicators/nvi.py
+++ b/jesse/indicators/nvi.py
@@ -3,8 +3,7 @@
 import numpy as np
 import tulipy as ti
 
-from jesse.helpers import get_candle_source, same_length
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, same_length, slice_candles
 
 
 def nvi(candles: np.ndarray, source_type: str = "close", sequential: bool = False) -> Union[float, np.ndarray]:
diff --git a/jesse/indicators/pfe.py b/jesse/indicators/pfe.py
index 9868b68cc..e0ed24411 100644
--- a/jesse/indicators/pfe.py
+++ b/jesse/indicators/pfe.py
@@ -3,7 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source, slice_candles, same_length
+from jesse.helpers import get_candle_source, same_length, slice_candles
 
 
 def pfe(candles: np.ndarray, period: int = 10, smoothing: int = 5, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/pma.py b/jesse/indicators/pma.py
index e7a4e10c1..5d7c097b8 100644
--- a/jesse/indicators/pma.py
+++ b/jesse/indicators/pma.py
@@ -1,11 +1,7 @@
-import numpy as np
-
 from collections import namedtuple
 
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+import numpy as np
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
@@ -37,7 +33,7 @@ def pma(candles: np.ndarray, source_type: str = "hl2", sequential: bool = False)
         return PMA(predict[-1], trigger[-1])
 
 
-@njit
+@njit(cache=True)
 def pma_fast(source):
     predict = np.full_like(source, np.nan)
     trigger = np.full_like(source, np.nan)
diff --git a/jesse/indicators/ppo.py b/jesse/indicators/ppo.py
index 5f6f3dd73..723213a75 100644
--- a/jesse/indicators/ppo.py
+++ b/jesse/indicators/ppo.py
@@ -1,10 +1,9 @@
 from typing import Union
 
 import numpy as np
-from jesse.indicators.ma import ma
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
+from jesse.indicators.ma import ma
 
 
 def ppo(candles: np.ndarray, fast_period: int = 12, slow_period: int = 26, matype: int = 0, source_type: str = "close",
diff --git a/jesse/indicators/pvi.py b/jesse/indicators/pvi.py
index 3dcddda1a..ea8e3c7a5 100644
--- a/jesse/indicators/pvi.py
+++ b/jesse/indicators/pvi.py
@@ -3,8 +3,7 @@
 import numpy as np
 import tulipy as ti
 
-from jesse.helpers import get_candle_source, same_length
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, same_length, slice_candles
 
 
 def pvi(candles: np.ndarray, source_type: str = "close", sequential: bool = False) -> Union[float, np.ndarray]:
diff --git a/jesse/indicators/pwma.py b/jesse/indicators/pwma.py
index c991992a4..f23be2db7 100644
--- a/jesse/indicators/pwma.py
+++ b/jesse/indicators/pwma.py
@@ -1,11 +1,11 @@
-from typing import Union
 from functools import reduce
 from operator import mul
+from typing import Union
 
 import numpy as np
 from numpy.lib.stride_tricks import sliding_window_view
 
-from jesse.helpers import get_candle_source, slice_candles, same_length
+from jesse.helpers import get_candle_source, same_length, slice_candles
 
 
 def pwma(candles: np.ndarray, period: int = 5, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/qstick.py b/jesse/indicators/qstick.py
index bd7443fce..21dca95c9 100644
--- a/jesse/indicators/qstick.py
+++ b/jesse/indicators/qstick.py
@@ -3,7 +3,7 @@
 import numpy as np
 import tulipy as ti
 
-from jesse.helpers import slice_candles, same_length
+from jesse.helpers import same_length, slice_candles
 
 
 def qstick(candles: np.ndarray, period: int = 5, sequential: bool = False) -> Union[float, np.ndarray]:
diff --git a/jesse/indicators/reflex.py b/jesse/indicators/reflex.py
index cf6eeee6c..4a4a39aca 100644
--- a/jesse/indicators/reflex.py
+++ b/jesse/indicators/reflex.py
@@ -1,12 +1,10 @@
 from typing import Union
 
 import numpy as np
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
+
 from .supersmoother import supersmoother_fast
 
 
@@ -39,7 +37,7 @@ def reflex(candles: np.ndarray, period: int = 20, source_type: str = "close", se
         return None if np.isnan(rf[-1]) else rf[-1]
 
 
-@njit
+@njit(cache=True)
 def reflex_fast(ssf, period):
     rf = np.full_like(ssf, 0)
     ms = np.full_like(ssf, 0)
diff --git a/jesse/indicators/rma.py b/jesse/indicators/rma.py
index 5fe5c16e0..2494edb15 100644
--- a/jesse/indicators/rma.py
+++ b/jesse/indicators/rma.py
@@ -1,10 +1,7 @@
-import numpy as np
 from typing import Union
 
-try:
-    from numba import njit, guvectorize
-except ImportError:
-    njit = lambda a: a
+import numpy as np
+from numba import guvectorize, njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
@@ -37,7 +34,7 @@ def rma(candles: np.ndarray, length: int = 14, source_type="close", sequential=F
     return res if sequential else res[-1]
 
 
-@njit
+@njit(cache=True)
 def rma_fast(source, _length):
     alpha = 1 / _length
     newseries = np.copy(source)
diff --git a/jesse/indicators/roc.py b/jesse/indicators/roc.py
index 3c4efa992..f4e4e2dc5 100644
--- a/jesse/indicators/roc.py
+++ b/jesse/indicators/roc.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def roc(candles: np.ndarray, period: int = 10, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/rocp.py b/jesse/indicators/rocp.py
index dc3e45681..dd94e91d1 100644
--- a/jesse/indicators/rocp.py
+++ b/jesse/indicators/rocp.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def rocp(candles: np.ndarray, period: int = 10, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/rocr.py b/jesse/indicators/rocr.py
index d80377b14..ac6bb9f3a 100644
--- a/jesse/indicators/rocr.py
+++ b/jesse/indicators/rocr.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def rocr(candles: np.ndarray, period: int = 10, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/rocr100.py b/jesse/indicators/rocr100.py
index 80dddbcc8..0791bde1f 100644
--- a/jesse/indicators/rocr100.py
+++ b/jesse/indicators/rocr100.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def rocr100(candles: np.ndarray, period: int = 10, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/roofing.py b/jesse/indicators/roofing.py
index 4dc2b4d32..bcd539058 100644
--- a/jesse/indicators/roofing.py
+++ b/jesse/indicators/roofing.py
@@ -3,6 +3,7 @@
 import numpy as np
 
 from jesse.helpers import get_candle_source, slice_candles
+
 from .high_pass_2_pole import high_pass_2_pole_fast
 from .supersmoother import supersmoother_fast
 
diff --git a/jesse/indicators/rsi.py b/jesse/indicators/rsi.py
index 0603d007d..1f3166c19 100644
--- a/jesse/indicators/rsi.py
+++ b/jesse/indicators/rsi.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def rsi(candles: np.ndarray, period: int = 14, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/rsmk.py b/jesse/indicators/rsmk.py
index 04b25f994..c607e2b55 100644
--- a/jesse/indicators/rsmk.py
+++ b/jesse/indicators/rsmk.py
@@ -2,9 +2,9 @@
 
 import numpy as np
 import talib
-from jesse.indicators.ma import ma
 
 from jesse.helpers import get_candle_source
+from jesse.indicators.ma import ma
 
 RSMK = namedtuple('RSMK', ['indicator', 'signal'])
 
diff --git a/jesse/indicators/rsx.py b/jesse/indicators/rsx.py
index e90f39d73..f95bc8deb 100644
--- a/jesse/indicators/rsx.py
+++ b/jesse/indicators/rsx.py
@@ -1,10 +1,7 @@
 from typing import Union
 
 import numpy as np
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
@@ -13,7 +10,7 @@ def rsx(candles: np.ndarray, period: int = 14, source_type: str = "close", seque
     float, np.ndarray]:
     """
     Relative Strength Xtra (rsx)
-   
+
     :param candles: np.ndarray
     :param period: int - default: 14
     :param source_type: str - default: "close"
@@ -29,7 +26,7 @@ def rsx(candles: np.ndarray, period: int = 14, source_type: str = "close", seque
     return res if sequential else res[-1]
 
 
-@njit
+@njit(cache=True)
 def rsx_fast(source, period):
     # variables
     f0 = 0
diff --git a/jesse/indicators/rvi.py b/jesse/indicators/rvi.py
index ea496fccc..e6fbc672d 100644
--- a/jesse/indicators/rvi.py
+++ b/jesse/indicators/rvi.py
@@ -2,13 +2,13 @@
 
 import numpy as np
 import talib
-from jesse.indicators.ma import ma
 
-from jesse.helpers import get_candle_source, same_length
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, same_length, slice_candles
+from jesse.indicators.ma import ma
 from jesse.indicators.mean_ad import mean_ad
 from jesse.indicators.median_ad import median_ad
 
+
 def rvi(candles: np.ndarray, period: int = 10, ma_len: int = 14, matype: int = 1, devtype: int = 0, source_type: str = "close",
         sequential: bool = False) -> Union[float, np.ndarray]:
     """
diff --git a/jesse/indicators/safezonestop.py b/jesse/indicators/safezonestop.py
index 3ea5a0c68..273370705 100644
--- a/jesse/indicators/safezonestop.py
+++ b/jesse/indicators/safezonestop.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import np_shift
-from jesse.helpers import slice_candles
+from jesse.helpers import np_shift, slice_candles
 
 
 def safezonestop(candles: np.ndarray, period: int = 22, mult: float = 2.5, max_lookback: int = 3,
diff --git a/jesse/indicators/sinwma.py b/jesse/indicators/sinwma.py
index 20c37e321..1c41cbb4e 100644
--- a/jesse/indicators/sinwma.py
+++ b/jesse/indicators/sinwma.py
@@ -3,7 +3,7 @@
 import numpy as np
 from numpy.lib.stride_tricks import sliding_window_view
 
-from jesse.helpers import get_candle_source, slice_candles, same_length
+from jesse.helpers import get_candle_source, same_length, slice_candles
 
 
 def sinwma(candles: np.ndarray, period: int = 14, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/skew.py b/jesse/indicators/skew.py
index 722d40b6c..246edf7fb 100644
--- a/jesse/indicators/skew.py
+++ b/jesse/indicators/skew.py
@@ -1,10 +1,10 @@
 from typing import Union
 
 import numpy as np
-from scipy import stats
 from numpy.lib.stride_tricks import sliding_window_view
+from scipy import stats
 
-from jesse.helpers import get_candle_source, slice_candles, same_length
+from jesse.helpers import get_candle_source, same_length, slice_candles
 
 
 def skew(candles: np.ndarray, period: int = 5, source_type: str = "hl2", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/sma.py b/jesse/indicators/sma.py
index 693f87c06..2f8d00adb 100644
--- a/jesse/indicators/sma.py
+++ b/jesse/indicators/sma.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def sma(candles: np.ndarray, period: int = 5, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/sqwma.py b/jesse/indicators/sqwma.py
index 76af36165..af8b78c25 100644
--- a/jesse/indicators/sqwma.py
+++ b/jesse/indicators/sqwma.py
@@ -1,11 +1,7 @@
 from typing import Union
-import numpy as np
-
 
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+import numpy as np
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
@@ -35,7 +31,7 @@ def sqwma(candles: np.ndarray, period: int = 14, source_type: str = "close", seq
     return res if sequential else res[-1]
 
 
-@njit
+@njit(cache=True)
 def sqwma_fast(source, period):
     newseries = np.copy(source)
     for j in range(period + 1, source.shape[0]):
diff --git a/jesse/indicators/srwma.py b/jesse/indicators/srwma.py
index cadc598c2..e42b69b9f 100644
--- a/jesse/indicators/srwma.py
+++ b/jesse/indicators/srwma.py
@@ -1,11 +1,7 @@
 from typing import Union
-import numpy as np
-
 
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+import numpy as np
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
@@ -35,7 +31,7 @@ def srwma(candles: np.ndarray, period: int = 14, source_type: str = "close", seq
     return res if sequential else res[-1]
 
 
-@njit
+@njit(cache=True)
 def srwma_fast(source, period):
     newseries = np.copy(source)
     for j in range(period + 1, source.shape[0]):
diff --git a/jesse/indicators/stc.py b/jesse/indicators/stc.py
index 6fc5edea8..33f59de46 100644
--- a/jesse/indicators/stc.py
+++ b/jesse/indicators/stc.py
@@ -3,10 +3,10 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 from jesse.indicators.ma import ma
 
+
 def stc(candles: np.ndarray, fast_period: int = 23, fast_matype: int = 1, slow_period: int = 50, slow_matype: int = 1,
         k_period: int = 10, d_period: int = 3,
         source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/stddev.py b/jesse/indicators/stddev.py
index 4fbf60784..2b1fa0138 100644
--- a/jesse/indicators/stddev.py
+++ b/jesse/indicators/stddev.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def stddev(candles: np.ndarray, period: int = 5, nbdev: float = 1, source_type: str = "close",
diff --git a/jesse/indicators/stochastic.py b/jesse/indicators/stochastic.py
index 3a93cb854..bf5a13be3 100644
--- a/jesse/indicators/stochastic.py
+++ b/jesse/indicators/stochastic.py
@@ -2,9 +2,9 @@
 
 import numpy as np
 import talib
-from jesse.indicators.ma import ma
 
 from jesse.helpers import slice_candles
+from jesse.indicators.ma import ma
 
 Stochastic = namedtuple('Stochastic', ['k', 'd'])
 
diff --git a/jesse/indicators/supersmoother.py b/jesse/indicators/supersmoother.py
index e2fd59504..ca1227aac 100644
--- a/jesse/indicators/supersmoother.py
+++ b/jesse/indicators/supersmoother.py
@@ -1,10 +1,7 @@
 from typing import Union
 
 import numpy as np
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
@@ -36,7 +33,7 @@ def supersmoother(candles: np.ndarray, period: int = 14, source_type: str = "clo
     return res if sequential else res[-1]
 
 
-@njit
+@njit(cache=True)
 def supersmoother_fast(source, period):
     a = np.exp(-1.414 * np.pi / period)
     b = 2 * a * np.cos(1.414 * np.pi / period)
diff --git a/jesse/indicators/supersmoother_3_pole.py b/jesse/indicators/supersmoother_3_pole.py
index 20cd12c37..bde8d988c 100644
--- a/jesse/indicators/supersmoother_3_pole.py
+++ b/jesse/indicators/supersmoother_3_pole.py
@@ -1,6 +1,7 @@
 from typing import Union
 
 import numpy as np
+
 try:
     from numba import njit
 except ImportError:
@@ -36,7 +37,7 @@ def supersmoother_3_pole(candles: np.ndarray, period: int = 14, source_type: str
     return res if sequential else res[-1]
 
 
-@njit
+@njit(cache=True)
 def supersmoother_fast(source, period):
     a = np.exp(-np.pi / period)
     b = 2 * a * np.cos(1.738 * np.pi / period)
diff --git a/jesse/indicators/supertrend.py b/jesse/indicators/supertrend.py
index cf7419109..faa32237b 100644
--- a/jesse/indicators/supertrend.py
+++ b/jesse/indicators/supertrend.py
@@ -2,10 +2,7 @@
 
 import numpy as np
 import talib
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
 from jesse.helpers import slice_candles
 
@@ -35,7 +32,7 @@ def supertrend(candles: np.ndarray, period: int = 10, factor: float = 3, sequent
         return SuperTrend(super_trend[-1], changed[-1])
 
 
-@njit
+@njit(cache=True)
 def supertrend_fast(candles, atr, factor, period):
     # Calculation of SuperTrend
     upper_basic = (candles[:, 3] + candles[:, 4]) / 2 + (factor * atr)
@@ -94,4 +91,4 @@ def supertrend_fast(candles, atr, factor, period):
             else:
                 super_trend[i] = currUpperBand  # switch to DOWNTREND
                 changed[i] = True
-    return super_trend, changed
\ No newline at end of file
+    return super_trend, changed
diff --git a/jesse/indicators/swma.py b/jesse/indicators/swma.py
index fb89a7f62..4aa97536e 100644
--- a/jesse/indicators/swma.py
+++ b/jesse/indicators/swma.py
@@ -1,9 +1,10 @@
-from typing import Union
 from math import floor
+from typing import Union
+
 import numpy as np
 from numpy.lib.stride_tricks import sliding_window_view
 
-from jesse.helpers import get_candle_source, slice_candles, same_length
+from jesse.helpers import get_candle_source, same_length, slice_candles
 
 
 def swma(candles: np.ndarray, period: int = 5, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/t3.py b/jesse/indicators/t3.py
index bca14af56..883830879 100644
--- a/jesse/indicators/t3.py
+++ b/jesse/indicators/t3.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def t3(candles: np.ndarray, period: int = 5, vfactor: float = 0, source_type: str = "close",
diff --git a/jesse/indicators/tema.py b/jesse/indicators/tema.py
index 662680d20..a3a9c5fe5 100644
--- a/jesse/indicators/tema.py
+++ b/jesse/indicators/tema.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def tema(candles: np.ndarray, period: int = 9, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/trendflex.py b/jesse/indicators/trendflex.py
index e7336f666..0daaf2160 100644
--- a/jesse/indicators/trendflex.py
+++ b/jesse/indicators/trendflex.py
@@ -1,12 +1,10 @@
 from typing import Union
 
 import numpy as np
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
+
 from .supersmoother import supersmoother_fast
 
 
@@ -40,7 +38,7 @@ def trendflex(candles: np.ndarray, period: int = 20, source_type: str = "close",
         return None if np.isnan(tf[-1]) else tf[-1]
 
 
-@njit
+@njit(cache=True)
 def trendflex_fast(ssf, period):
     tf = np.full_like(ssf, 0)
     ms = np.full_like(ssf, 0)
diff --git a/jesse/indicators/trima.py b/jesse/indicators/trima.py
index 0dea09103..a8bc051db 100644
--- a/jesse/indicators/trima.py
+++ b/jesse/indicators/trima.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def trima(candles: np.ndarray, period: int = 30, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/trix.py b/jesse/indicators/trix.py
index 4fb3c1ecc..cbe6dc72a 100644
--- a/jesse/indicators/trix.py
+++ b/jesse/indicators/trix.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def trix(candles: np.ndarray, period: int = 18, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/tsf.py b/jesse/indicators/tsf.py
index a110b162e..01f26ab62 100644
--- a/jesse/indicators/tsf.py
+++ b/jesse/indicators/tsf.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def tsf(candles: np.ndarray, period: int = 14, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/tsi.py b/jesse/indicators/tsi.py
index 5eeaa5575..17d4575b7 100644
--- a/jesse/indicators/tsi.py
+++ b/jesse/indicators/tsi.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def tsi(candles: np.ndarray, long_period: int = 25, short_period: int = 13, source_type: str = "close",
diff --git a/jesse/indicators/ttm_trend.py b/jesse/indicators/ttm_trend.py
index 51991d34b..8e8c1a663 100644
--- a/jesse/indicators/ttm_trend.py
+++ b/jesse/indicators/ttm_trend.py
@@ -3,7 +3,7 @@
 import numpy as np
 from numpy.lib.stride_tricks import sliding_window_view
 
-from jesse.helpers import get_candle_source, slice_candles, same_length
+from jesse.helpers import get_candle_source, same_length, slice_candles
 
 
 def ttm_trend(candles: np.ndarray, period: int = 5, source_type: str = "hl2", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/ui.py b/jesse/indicators/ui.py
index 1915c6b99..81487c0e5 100644
--- a/jesse/indicators/ui.py
+++ b/jesse/indicators/ui.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def ui(candles: np.ndarray, period: int = 14, scalar: float = 100, source_type: str = "close",  sequential: bool = False) -> Union[float, np.ndarray]:
diff --git a/jesse/indicators/var.py b/jesse/indicators/var.py
index cb7ec3bf8..e32bb8b13 100644
--- a/jesse/indicators/var.py
+++ b/jesse/indicators/var.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def var(candles: np.ndarray, period: int = 14, nbdev: float = 1, source_type: str = "close",
diff --git a/jesse/indicators/vi.py b/jesse/indicators/vi.py
index 6f31adcdf..2f956e655 100644
--- a/jesse/indicators/vi.py
+++ b/jesse/indicators/vi.py
@@ -1,10 +1,7 @@
 from collections import namedtuple
 
 import numpy as np
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
 from jesse.helpers import slice_candles
 
@@ -31,7 +28,7 @@ def vi(candles: np.ndarray, period: int = 14, sequential: bool = False) -> VI:
         return VI(vpn_with_nan[-1], vmn_with_nan[-1])
 
 
-@njit
+@njit(cache=True)
 def vi_fast(candles, period):
     candles_close = candles[:, 2]
     candles_high = candles[:, 3]
diff --git a/jesse/indicators/vidya.py b/jesse/indicators/vidya.py
index 21ae3a47f..2e3e20751 100644
--- a/jesse/indicators/vidya.py
+++ b/jesse/indicators/vidya.py
@@ -3,8 +3,7 @@
 import numpy as np
 import tulipy as ti
 
-from jesse.helpers import get_candle_source, same_length
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, same_length, slice_candles
 
 
 def vidya(candles: np.ndarray, short_period: int = 2, long_period: int = 5, alpha: float = 0.2,
diff --git a/jesse/indicators/vlma.py b/jesse/indicators/vlma.py
index 31ff6faf2..5dc5e84e0 100644
--- a/jesse/indicators/vlma.py
+++ b/jesse/indicators/vlma.py
@@ -1,18 +1,14 @@
 from typing import Union
-import talib
+
 import numpy as np
+import talib
+from numba import njit
 
+from jesse.helpers import get_candle_source, slice_candles
 from jesse.indicators.ma import ma
 from jesse.indicators.mean_ad import mean_ad
 from jesse.indicators.median_ad import median_ad
 
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
-
-from jesse.helpers import get_candle_source, slice_candles
-
 
 def vlma(candles: np.ndarray, min_period: int = 5, max_period: int = 50, matype: int = 0, devtype: int = 0, source_type: str = "close", sequential: bool = False) -> Union[
     float, np.ndarray]:
@@ -56,7 +52,7 @@ def vlma(candles: np.ndarray, min_period: int = 5, max_period: int = 50, matype:
     return res if sequential else res[-1]
 
 
-@njit
+@njit(cache=True)
 def vlma_fast(source, a, b, c, d, min_period, max_period):
     newseries = np.copy(source)
     period = np.zeros_like(source)
diff --git a/jesse/indicators/vosc.py b/jesse/indicators/vosc.py
index a7a4b778c..1c8dacb2d 100644
--- a/jesse/indicators/vosc.py
+++ b/jesse/indicators/vosc.py
@@ -3,7 +3,7 @@
 import numpy as np
 import tulipy as ti
 
-from jesse.helpers import slice_candles, same_length
+from jesse.helpers import same_length, slice_candles
 
 
 def vosc(candles: np.ndarray, short_period: int = 2, long_period: int = 5, sequential: bool = False) -> Union[
diff --git a/jesse/indicators/voss.py b/jesse/indicators/voss.py
index 79574aae8..8e1e26f0d 100644
--- a/jesse/indicators/voss.py
+++ b/jesse/indicators/voss.py
@@ -1,10 +1,7 @@
 from collections import namedtuple
 
 import numpy as np
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
@@ -37,7 +34,7 @@ def voss(candles: np.ndarray, period: int = 20, predict: int = 3, bandwith: floa
         return VossFilter(voss_val[-1], filt[-1])
 
 
-@njit
+@njit(cache=True)
 def voss_fast(source, period, predict, bandwith):
     voss = np.full_like(source, 0)
     filt = np.full_like(source, 0)
diff --git a/jesse/indicators/vpwma.py b/jesse/indicators/vpwma.py
index eb374c567..1a11af041 100644
--- a/jesse/indicators/vpwma.py
+++ b/jesse/indicators/vpwma.py
@@ -1,11 +1,7 @@
 from typing import Union
-import numpy as np
-
 
-try:
-    from numba import njit
-except ImportError:
-    njit = lambda a : a
+import numpy as np
+from numba import njit
 
 from jesse.helpers import get_candle_source, slice_candles
 
@@ -36,7 +32,7 @@ def vpwma(candles: np.ndarray, period: int = 14, power: float = 0.382, source_ty
     return res if sequential else res[-1]
 
 
-@njit
+@njit(cache=True)
 def vpwma_fast(source, period, power):
     newseries = np.copy(source)
     for j in range(period + 1, source.shape[0]):
diff --git a/jesse/indicators/vwap.py b/jesse/indicators/vwap.py
index 0345686e4..8d1bd2686 100644
--- a/jesse/indicators/vwap.py
+++ b/jesse/indicators/vwap.py
@@ -1,11 +1,8 @@
 from typing import Union
 
 import numpy as np
-try:
-    from numba import njit
-    from numpy_groupies import aggregate_nb as aggregate
-except ImportError:
-    from numpy_groupies import aggregate
+from numba import njit
+from numpy_groupies import aggregate_nb as aggregate
 
 from jesse.helpers import get_candle_source, slice_candles
 
diff --git a/jesse/indicators/vwma.py b/jesse/indicators/vwma.py
index f6bd3d37b..8b250d99f 100644
--- a/jesse/indicators/vwma.py
+++ b/jesse/indicators/vwma.py
@@ -3,8 +3,7 @@
 import numpy as np
 import tulipy as ti
 
-from jesse.helpers import get_candle_source, same_length
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, same_length, slice_candles
 
 
 def vwma(candles: np.ndarray, period: int = 20, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/wad.py b/jesse/indicators/wad.py
index 6b531cd3e..a1a32cbde 100644
--- a/jesse/indicators/wad.py
+++ b/jesse/indicators/wad.py
@@ -3,7 +3,7 @@
 import numpy as np
 import tulipy as ti
 
-from jesse.helpers import slice_candles, same_length
+from jesse.helpers import same_length, slice_candles
 
 
 def wad(candles: np.ndarray, sequential: bool = False) -> Union[float, np.ndarray]:
diff --git a/jesse/indicators/wilders.py b/jesse/indicators/wilders.py
index 3349a9d40..d85c5eaa3 100644
--- a/jesse/indicators/wilders.py
+++ b/jesse/indicators/wilders.py
@@ -3,8 +3,7 @@
 import numpy as np
 import tulipy as ti
 
-from jesse.helpers import get_candle_source, same_length
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, same_length, slice_candles
 
 
 def wilders(candles: np.ndarray, period: int = 5, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/wma.py b/jesse/indicators/wma.py
index 11a02260a..3d9fb0233 100644
--- a/jesse/indicators/wma.py
+++ b/jesse/indicators/wma.py
@@ -3,8 +3,7 @@
 import numpy as np
 import talib
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, slice_candles
 
 
 def wma(candles: np.ndarray, period: int = 30, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/zlema.py b/jesse/indicators/zlema.py
index 0134b155b..30936c0c5 100644
--- a/jesse/indicators/zlema.py
+++ b/jesse/indicators/zlema.py
@@ -3,8 +3,7 @@
 import numpy as np
 import tulipy as ti
 
-from jesse.helpers import get_candle_source, same_length
-from jesse.helpers import slice_candles
+from jesse.helpers import get_candle_source, same_length, slice_candles
 
 
 def zlema(candles: np.ndarray, period: int = 20, source_type: str = "close", sequential: bool = False) -> Union[
diff --git a/jesse/indicators/zscore.py b/jesse/indicators/zscore.py
index b66ac1082..c6434b9d7 100644
--- a/jesse/indicators/zscore.py
+++ b/jesse/indicators/zscore.py
@@ -2,13 +2,12 @@
 
 import numpy as np
 import talib
+
+from jesse.helpers import get_candle_source, slice_candles
 from jesse.indicators.ma import ma
 from jesse.indicators.mean_ad import mean_ad
 from jesse.indicators.median_ad import median_ad
 
-from jesse.helpers import get_candle_source
-from jesse.helpers import slice_candles
-
 
 def zscore(candles: np.ndarray, period: int = 14, matype: int = 0, nbdev: float = 1, devtype: int = 0, source_type: str = "close",
            sequential: bool = False) -> Union[float, np.ndarray]:
diff --git a/jesse/services/required_candles.py b/jesse/services/required_candles.py
index 99697e1e2..d6c143879 100644
--- a/jesse/services/required_candles.py
+++ b/jesse/services/required_candles.py
@@ -1,3 +1,5 @@
+from datetime import datetime
+
 import arrow
 import numpy as np
 
@@ -87,6 +89,7 @@ def load_required_candles(exchange: str, symbol: str, start_date_str: str, finis
         )[0][0]
 
         first_backtestable_timestamp = first_existing_candle + (pre_finish_date - pre_start_date) + (60_000 * 1440)
+        first_backtestable_datetime = datetime.fromtimestamp(first_backtestable_timestamp/1000)
 
         # if first backtestable timestamp is in the future, that means we have some but not enough candles
         if first_backtestable_timestamp > jh.today_to_timestamp():
@@ -96,7 +99,9 @@ def load_required_candles(exchange: str, symbol: str, start_date_str: str, finis
             )
 
         raise CandleNotFoundInDatabase(
-            f'Not enough candles for {exchange} {symbol} exists to run backtest from {start_date_str} => {finish_date_str}. \n'
+            f'Not enough candles for {exchange} {symbol} exists to run backtest from {start_date_str} => {finish_date_str} '
+            f'(first possible date is {first_backtestable_datetime.date()}). \n'
+
             f'Are you considering the warmup candles? For more info please read:\n https://jesse.trade/help/faq/i-imported-candles-but-keep-getting-not-enough-candles'
         )
 
diff --git a/requirements.txt b/requirements.txt
index 57e8762f7..94e574497 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,3 +29,4 @@ websockets>=10.0.0
 python-dotenv==0.19.2
 aiofiles==0.7.0
 jesse-dydx-v3-python==1.0.4
+numba==0.58.1