What is Money Flow Index (MFI)? Meaning and Importance in India
The Money Flow Index (MFI) is a momentum oscillator that combines price and volume on a 0 to 100 scale. It is often called the volume-weighted RSI. Because heavy-volume days move it more than quiet ones, MFI tracks the conviction behind moves, not just their direction.
Suppose Sun Pharma rises for a week, but the up days come on weak volume while the down days are heavy. RSI may look fine, yet MFI sags toward 40. The volume lens reveals distribution hiding inside the rally.
Money Flow = Typical Price × Volume; MFI = 100 − 100 / (1 + Positive MF / Negative MF)
How does MFI differ from RSI in practice?
RSI treats every session equally, while MFI scales each session by its volume, so institutional-sized days dominate the reading. The two often agree, and their disagreement is the information: a rising RSI with a falling MFI means price is climbing without volume support. Conventional extreme levels are 80 for overbought and 20 for oversold, slightly wider than RSI's.
How do traders use MFI?
Extremes are treated as condition flags: above 80 marks stretched, volume-backed buying and below 20 stretched selling, with trends able to hold extremes for extended periods. Divergences are MFI's strongest signal, since they reveal volume abandoning a price move. Many traders use MFI as a confirmation layer over price breakouts rather than a standalone trigger.
You can test MFI based setups on liquid stocks through Stockk equity trading. Index traders often combine it with option data while trading F&O on Stockk.
Technical analysis involves interpretation. The same chart can be read differently by different traders. Always combine multiple tools and manage risk before acting on any signal.
Frequently Asked Questions
Why are MFI extreme levels set at 80 and 20?
Volume weighting makes MFI reach extremes slightly less often than RSI, so wider thresholds suit it. The 80/20 convention balances signal frequency and quality. Some traders use 90/10 for stricter filters.
What does an MFI divergence tell me?
Price advancing to new highs while MFI declines shows volume flowing out despite the rally. It is an early distribution warning. The reverse at lows hints at quiet accumulation.
Does MFI work on low-volume stocks?
Poorly, since one large trade can distort the reading. Liquid NSE names give dependable signals. Treat MFI on illiquid small caps with caution.
Can MFI confirm breakouts?
Yes, a breakout with MFI rising through the 50-60 area shows volume participating in the move. Breakouts with flat or falling MFI lack sponsorship. It works as a quality check.
Should I use MFI together with OBV?
They cover similar ground; MFI is bounded and faster, OBV cumulative and slower. One volume-flow tool is usually enough. StockkAsk can compare both on a stock you follow to show the difference.
Investments in securities market are subject to market risks. This article is for educational purposes only and does not constitute investment advice.
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