MFI
Summary
Money Flow Index: a volume-weighted momentum oscillator (0-100) comparing positive vs negative money flow over a period. A volume-based analog of RSI. >80 overbought, <20 oversold.
Formula
TP = (High+Low+Close)/3; MF = TP*Volume, classed positive if TP>prevTP, negative if TP<prevTP, neither if equal. MFI = 100 * posSumMF/(posSumMF+negSumMF).
Notes
- When the typical price is unchanged from the prior bar, that bar's money flow is counted as neither positive nor negative.
Inputs
inPriceHLCV— High, low, close, and volume series
Outputs
outReal— Money Flow Index
Parameters
optInTimePeriod— Lookback window for summing money flow
Implementation
TA-Lib Definition: mfi.c · mfi.yaml
| Native | File |
|---|---|
| C | ta_MFI.c |
| Rust | mfi.rs |
| Java | Core.java |
TA-Lib is also available for Python, R and more using a wrapper.
Aliases
Money Flow Index
See Also
References
- Gene Quong & Avrum Soudack, Volume-Weighted RSI: Money Flow, Technical Analysis of Stocks & Commodities, V.7:3 (March 1989)