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Technical Analysis

The Money Flow Index: RSI with volume

The Money Flow Index is essentially RSI that also counts volume — an overbought/oversold line that asks not just how far price moved, but how much conviction was behind it.

Technical AnalysisIntermediate8 min read
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RSI, which you met earlier, measures momentum from price alone — how far and how fast a stock has moved. But two identical-looking rallies can mean very different things if one happened on heavy volume and the other on almost none. The Money Flow Index is RSI’s answer to that: the same overbought-oversold idea, with volume folded in.

Where it differs from RSI

On most charts MFI and RSI trace nearly the same path, and that is the honest starting point — much of the time they agree. The difference appears precisely when price and volume disagree. A push to new highs on fading volume lifts RSI more than MFI, because MFI docks the move for its thin participation. That divergence between the two lines is the one moment MFI is telling you something RSI alone cannot: the buyers driving the move are getting fewer.

Check yourself

A stock pushes to a new high, but the Money Flow Index makes a lower high than on the previous peak. What does this suggest?

Simple bhasha mein
Volume wala RSI

RSI sirf price se momentum naapta hai. Money Flow Index (MFI) usme volume bhi jodta hai — isliye "volume-weighted RSI". 0-100, 80 overbought, 20 oversold. Bana hai "money flow" se: typical price × volume — toh heavy volume wala move zyada count hota, patla volume kam. Chart pe zyada tar RSI jaisa hi dikhta hai; farak tab jab price upar par volume kamzor — MFI kam uthta, yahi extra info. Sabse kaam ki cheez: divergence jo already volume account kar chuki. Par bharosemand volume chahiye — liquid names pe theek, patle stocks pe erratic.

What to remember
  • The Money Flow Index is a 0–100 oscillator — essentially RSI with volume added.
  • It is built from money flow: typical price times volume, so conviction counts.
  • It mostly tracks RSI, differing when price and volume disagree.
  • Its best use is divergence that already accounts for volume; 80/20 give context.
  • It needs reliable volume, so use it on liquid names, not thin ones.
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Common questions

Short, direct answers to what people ask about this topic.

what is the money flow index
The Money Flow Index (MFI) is a momentum oscillator, scaled 0 to 100, that measures buying and selling pressure using both price and volume — which is why it is often called a volume-weighted RSI. Readings above 80 are generally treated as overbought and below 20 as oversold. It is built from "money flow", the typical price of each bar multiplied by its volume, so a price move backed by heavy volume moves the MFI more than the same move on light volume.
money flow index vs rsi
The two look almost identical on a chart and are read the same way, but RSI uses price alone while MFI folds volume in, so the difference shows up when price and volume disagree. A rally on shrinking volume will push RSI up more than MFI, because MFI discounts the move for its weak participation; that gap is exactly the information MFI adds. If you already watch RSI and volume separately, MFI mainly combines them into one line rather than telling you something wholly new.
how to use the money flow index
It is used like RSI: overbought above 80 and oversold below 20 as context rather than automatic signals, and — more usefully — for divergence, where price makes a new high but MFI does not, hinting the move lacks volume support. Because it incorporates volume, an MFI divergence is sometimes read as a stronger warning than an RSI one. As always, treat it as a filter that must fit the instrument and be confirmed by price, not as a standalone buy-sell trigger.
what are the best money flow index settings
The standard period is 14, matching the common RSI setting, which suits daily charts of liquid stocks. A shorter period makes it more sensitive and noisier; a longer one smooths it and delays its signals. The setting does not create an edge, and MFI is only meaningful on instruments with reliable volume data — so it works best on liquid, high-volume names and poorly on thin ones where the volume figure is erratic.