A volume-weighted RSI that measures buying and selling pressure — values above 80 are overbought, below 20 are oversold.
Money Flow Index is essentially RSI with volume baked in. It measures the same overbought/oversold concept but weights each price change by the volume that occurred during that period. Big volume up days push MFI up faster than small volume up days. The result is a momentum oscillator that's more sensitive to actual buying and selling pressure than pure-price RSI.
MFI ranges from 0 to 100, with 80+ being overbought and 20- being oversold. Like RSI, the most useful signals are divergences — when price makes a new high but MFI makes a lower high, sellers are more active than the price chart suggests.
MFI is best on assets with reliable volume data: stocks, indices, crypto. On spot forex it's less reliable because volume isn't centralized.
BTCUSD printed a textbook bearish MFI divergence at $73k in March 2024 — price topped, MFI made a lower high, and the reversal led to a 25% drop over the next two months.
Frequently asked about mfi (money flow index)
What is a mfi (money flow index) in trading?+
A volume-weighted RSI that measures buying and selling pressure — values above 80 are overbought, below 20 are oversold.
When will I see mfi (money flow index) used in real trading?+
On stock, index, futures, and crypto charts where volume is meaningful. Set the period to 14 for default behavior.
What is the most common mistake traders make with mfi (money flow index)?+
Trusting MFI on spot forex pairs. The indicator needs reliable volume — without it, MFI just becomes a worse RSI.
What do experienced traders know about mfi (money flow index) that beginners don't?+
Pair MFI with price action at major levels. An overbought MFI at major resistance with a bearish reversal candle is one of the cleanest fade setups in indicators.
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