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Original file line number | Diff line number | Diff line change |
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from collections import namedtuple | ||
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import numpy as np | ||
from .ema import ema | ||
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SupportResistanceWithBreaks = namedtuple('SupportResistanceWithBreaks', ['support', 'resistance', 'red_break', 'green_break', 'bear_wick', 'bull_wick']) | ||
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def support_resistance_with_breaks(candles: np.ndarray, left_bars: int = 15, right_bars: int = 15, vol_threshold: int = 20) -> SupportResistanceWithBreaks: | ||
""" | ||
support_resistance_with_breaks | ||
@author LuxAlgo | ||
credits: https://www.tradingview.com/script/JDFoWQbL-Support-and-Resistance-Levels-with-Breaks-LuxAlgo | ||
:param candles: np.ndarray | ||
:param left_bars: int - default: 15 | ||
:param right_bars: int - default: 15 | ||
:param vol_threshold: int - default: 20 | ||
:return: SupportResistanceWithBreaks(support, resistance, red_break, green_break, bear_wick, bull_wick) | ||
""" | ||
resistance = _resistance(candles[:, 3], left_bars, right_bars) | ||
support = _support(candles[:, 4], left_bars, right_bars) | ||
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short = ema(candles[:, 5], 5) | ||
long = ema(candles[:, 5], 10) | ||
osc = 100 * (short - long) / long | ||
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last_candles = candles[0] | ||
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red_break = True if last_candles[2] < support and not abs( | ||
last_candles[1] - last_candles[2]) < abs(last_candles[1] - last_candles[3]) and osc > vol_threshold else False | ||
green_break = True if last_candles[2] > resistance and abs( | ||
last_candles[1] - last_candles[4]) > abs(last_candles[1] - last_candles[2]) and osc > vol_threshold else False | ||
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bull_wick = True if last_candles[2] > resistance and abs(last_candles[1] - last_candles[4]) > abs(last_candles[1] - last_candles[2]) else False | ||
bear_wick = True if last_candles[2] < support and abs(last_candles[1] - last_candles[2]) < abs(last_candles[1] - last_candles[3]) else False | ||
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return SupportResistanceWithBreaks(support, resistance, red_break, green_break, bear_wick, bull_wick) | ||
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def _resistance(source, left_bars, right_bars): | ||
pivot_highs = [None] * len(source) # Initialize result list with None | ||
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for i in range(left_bars, len(source) - right_bars): | ||
is_pivot_high = True | ||
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# Check left bars for higher high | ||
for j in range(1, left_bars + 1): | ||
if source[i] <= source[i - j]: | ||
is_pivot_high = False | ||
break | ||
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# Check right bars for higher high | ||
if is_pivot_high: | ||
for j in range(1, right_bars + 1): | ||
if source[i] <= source[i + j]: | ||
is_pivot_high = False | ||
break | ||
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if is_pivot_high: | ||
is_pivot_high = source[i] | ||
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pivot_highs[i] = is_pivot_high | ||
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next_valid = None | ||
first_value = None | ||
for i in range(len(pivot_highs)): | ||
if pivot_highs[i] is False: | ||
pivot_highs[i] = next_valid | ||
elif pivot_highs[i] is not None: # Update next_valid if it's not False or None | ||
next_valid = pivot_highs[i] | ||
first_value = i if first_value is None else first_value | ||
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pivot_highs[:first_value - 1] = [pivot_highs[first_value]] * len(pivot_highs[:first_value - 1]) | ||
pivot_highs[-right_bars:] = [pivot_highs[-right_bars - 1]] * len(pivot_highs[-right_bars:]) | ||
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return pivot_highs[-1] | ||
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def _support(source, left_bars, right_bars): | ||
pivot_lows = [None] * len(source) # Initialize result list with None | ||
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for i in range(left_bars, len(source) - right_bars): | ||
is_pivot_low = True | ||
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# Check left bars for lower low | ||
for j in range(1, left_bars + 1): | ||
if source[i] >= source[i - j]: | ||
is_pivot_low = False | ||
break | ||
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# Check right bars for lower low | ||
if is_pivot_low: | ||
for j in range(1, right_bars + 1): | ||
if source[i] >= source[i + j]: | ||
is_pivot_low = False | ||
break | ||
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if is_pivot_low: | ||
is_pivot_low = source[i] | ||
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pivot_lows[i] = is_pivot_low | ||
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next_valid = None | ||
first_value = None | ||
for i in range(len(pivot_lows)): | ||
if pivot_lows[i] is False: | ||
pivot_lows[i] = next_valid | ||
elif pivot_lows[i] is not None: # Update next_valid if it's not False or None | ||
next_valid = pivot_lows[i] | ||
first_value = i if first_value is None else first_value | ||
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pivot_lows[:first_value - 1] = [pivot_lows[first_value]] * len(pivot_lows[:first_value - 1]) | ||
pivot_lows[-right_bars:] = [pivot_lows[-right_bars - 1]] * len(pivot_lows[-right_bars:]) | ||
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return pivot_lows[-1] |
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Original file line number | Diff line number | Diff line change |
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@@ -1 +1 @@ | ||
__version__ = '0.48.5' | ||
__version__ = '0.48.6' |
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