add documentation about MFI

README.md

@@ -28,6 +28,7 @@ The main feature of these indicators is their continuous operation, which means
 - [Exponential Weighted Moving Average (EWMA)](./docs/ExponentialWeightedMovingAverage.md).
 - [Linearly Weighted Moving Average (LWMA)](./docs/LinearlyWeightedMovingAverage.md).
 - [Moving Average Convergence Divergence (MACD)](./docs/MovingAverageConvergenceDivergence.md).
+- [Money Flow Index (MFI)](./docs/MoneyFlowIndex.md).
 - [Pivot Point Levels (classic / woodie /camarilla / fibonacci)](./docs/PivotPointLevels.md).
 - [Rate of Change (ROC)](./docs/RateofChange.md).
 - [Relative Strength Index (RSI)](./docs/RelativeStrengthIndex.md).

docs/MoneyFlowIndex.md

@@ -0,0 +1,14 @@
+# Money Flow Index (MFI)
+ Money Flow Index (MFI) is a movement indicator used in technical analysis that looks at time and price to measure the trading pressure — buying or selling. It is also called volume-weighted Relative Strength Index (RSI), as it includes volume, unlike RSI, which only incorporates price.
+
+## Key features
+
+- The Money Flow Index (MFI) is a technical indicator that generates overbought or oversold signals using both prices and volume data.
+
+- An MFI reading above 80 is considered overbought and an MFI reading below 20 is considered oversold, although levels of 90 and 10 are also used as thresholds.
+
+- A divergence between the indicator and price is noteworthy. For example, if the indicator is rising while the price is falling or flat, the price could start rising.
+
+## How to calculate Money Flow Index (MFI) in excel spreadsheet?
+
+[Download excel sample](../tests/mfi/MoneyFlowIndex.xlsm)