Reading Charts . Lesson 10 of 12

Money Flow Index

How beginners use MFI to spot money flowing in, money flowing out, buy clues and sell warnings.

The Money Flow Index, or MFI, is a momentum indicator that includes volume. It is often described as RSI with volume included. RSI looks mostly at price movement. MFI asks a slightly deeper question: is real trading volume supporting the move?

For beginners, the two most important MFI levels are 20 and 80. Below 20 is an oversold buy watch zone. Above 80 is an overbought sell watch zone. But the zone is not the signal by itself. The clearer signal is usually when MFI crosses back out of the extreme zone and price confirms the move.

Part One

The beginner rule: below 20 is buy watch, above 80 is sell watch

When MFI falls below 20, the stock may be oversold. That means selling pressure and volume may have pushed the stock too far down in the short term. This can lead to a bounce, but it does not mean you buy instantly.

When MFI rises above 80, the stock may be overbought. That means buying pressure and volume may have pushed the stock too far up in the short term. This can lead to a pullback, but it does not mean you sell instantly.

Part Two

Buy signal one: MFI crosses back above 20

The simplest MFI buy clue happens when MFI falls below 20, then crosses back above 20. This says the selling pressure may be easing and money flow may be turning back upward.

The best beginner version is simple: price reaches support, MFI drops below 20, price stops falling, then MFI crosses back above 20. The MFI cross is the clue. The support bounce is the confirmation.

Part Three

Sell signal one: MFI crosses back below 80

The simplest MFI sell warning happens when MFI rises above 80, then crosses back below 80. This says the buying pressure may be cooling and money flow may be turning downward.

This matters most near resistance or after a strong rally. If price is stretched, reaches resistance, and MFI crosses back below 80, that can be a reason to take profit, tighten a stop, or avoid chasing.

Part Four

The 50 line: simple money-flow confirmation

The 50 line is the middle of the MFI panel. MFI above 50 means money flow is leaning more bullish. MFI below 50 means money flow is leaning more bearish.

This is slower than the 20/80 signals, but it helps confirm whether the move has improved. A cross above 50 after an oversold buy clue can strengthen the buy idea. A cross below 50 after an overbought sell warning can strengthen the exit signal.

Simple Signal Summary

Four MFI signals beginners should know

MFI Signal	What It Means	Beginner Action
Cross back above 20	Selling pressure may be easing.	Possible buy clue.
Cross back below 80	Buying pressure may be cooling.	Possible sell warning.
Cross above 50	Money flow shifts back toward buyers.	Buy confirmation.
Cross below 50	Money flow shifts back toward sellers.	Sell confirmation.

Part Five

Bullish and bearish divergence

Divergence is more advanced, but it is one of the most useful MFI signals because MFI includes volume. Bullish divergence happens when price makes a lower low but MFI makes a higher low. This can mean selling pressure is weakening even though price still looks weak.

Bearish divergence is the opposite. Price makes a higher high but MFI makes a lower high. This can mean the rally is not being supported by the same level of buying pressure.

Part Six

Why volume changes the signal

Two stocks can both rise by the same percentage, but the move can mean different things. If one stock rises on low volume, the move may be weak. If another stock rises on heavy volume, the move has stronger participation behind it.

This is where MFI helps. It does not just ask whether price is moving. It asks whether price is moving with volume behind it. Rising MFI suggests money is flowing in. Falling MFI suggests money is flowing out.

Part Seven

Filter MFI with the trend

MFI can stay overbought in a strong uptrend and oversold in a strong downtrend. That is why beginners should not treat 20 and 80 as automatic buy or sell buttons.

In an uptrend, oversold MFI signals can be useful buy clues when price holds support. In a downtrend, overbought MFI signals can be useful sell or avoid warnings when price rejects resistance.

Buy Signals from MFI

When MFI supports a buy idea

Signal	What to Look For	Best Confirmation
Oversold cross back	MFI drops below 20, then crosses back above.	Support bounce or green candle.
MFI 50 cross up	MFI rises through 50 from below.	Price starts making higher lows.
Bullish divergence	Price lower low, MFI higher low.	Price turns up from support.
MFI + RSI agree	Both are oversold and turning back up.	Trend and support still hold.

Sell Signals from MFI

When MFI warns you to exit or avoid

Key Takeaways

Six things to take from this lesson

01	MFI combines price and volume to measure money-flow pressure on a 0 to 100 scale.
02	Below 20 is a buy watch zone. Above 80 is a sell watch zone.
03	A cross back above 20 can be a buy clue. A cross back below 80 can be a sell warning.
04	The 50 line helps confirm whether money flow is shifting toward buyers or sellers.
05	Divergence is more advanced, but powerful when price and money flow disagree.
06	MFI works best with support, resistance, trend, and volume context. Do not use it alone.

Five Commitments

What you commit to before moving on

Read each one. If you cannot honestly commit to it, the lesson is not finished.

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End of Lesson

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