Is MFI just RSI with volume?

Close, but two things differ. MFI weights each bar's flow by volume, and it is defined on typical price rather than the close. Where the two disagree, the gap is telling you that the price move and the participation behind it are not aligned — which is the whole reason to run MFI instead of RSI.

Does MFI work in forex?

With a caveat. FX has no central exchange and most brokers report tick volume — the number of price changes in a bar — rather than traded size. That is a reasonable activity proxy and MFI remains usable, but the readings are broker-specific and 'money flow' is a metaphor rather than a measurement. On instruments with real exchange volume the indicator does what its name says.

Why are the levels 80 and 20 instead of 70 and 30?

Convention, and it reflects that MFI moves further than RSI on the same data because the volume weighting amplifies active bars. They are your levels either way — iMFI takes no threshold argument — so test them rather than inheriting them.

Can I use real volume instead of tick volume?

MQL5 supports it: iMFI takes an applied-volume argument that accepts VOLUME_REAL. Whether you get anything back depends on the broker and the instrument. On most retail FX feeds real volume is absent or zero, which is why the Builder uses VOLUME_TICK.

Can I build an MFI EA without coding?

Yes for level rules and centreline crosses — one MFI node plus a Compare, with the period as an EA input. The MFI + Standard Deviation template also shows the dispersion filter that makes a fade survivable. Divergence and 'a breakout with no participation' are the exceptions and need custom MQL5.

How should I validate settings before going live?

Backtest on quality tick data first, then run the EA on a demo account before risking money. With MFI specifically, remember the tick-volume caveat — a strategy tuned on one broker's tick counts may behave differently on another's. When optimising, hold back data the search never saw.

Money Flow Index (MFI) for MT5 traders

What MFI tells you

MFI splits each bar's typical price move into positive or negative money flow, multiplies it by that bar's volume, and expresses the balance on a 0–100 scale. The intuition is that a move backed by heavy participation matters more than the same move on a quiet bar.

Above 80: buying flow has dominated the window
Below 20: selling flow has
Around 50: participation is balanced between the two sides

1 Multiply typical price by volume for each bar
2 Split into positive and negative flow
3 Express the ratio on a 0–100 scale

Mostra la formula e i dettagli del calcolo

MFI weights each bar’s price movement by the volume that accompanied it:

Compute the typical price of each bar: TP = (High + Low + Close) / 3.
Multiply by the bar’s volume to get raw money flow: MF = TP × Volume.
Classify it. If today’s typical price is higher than yesterday’s, the flow is positive; if lower, negative.
Sum positive and negative flow separately over the period, form their ratio, and convert to a bounded index: MFI = 100 − (100 / (1 + positive flow / negative flow)).

That last step is identical in form to RSI’s — which is why the two look so similar and why MFI is often described as a volume-weighted RSI. The differences are upstream: MFI is built on typical price rather than the close, and each bar’s contribution is scaled by how much trading happened during it.

The scaling is where the practical caveat lives. On an exchange-traded instrument, volume is contracts changing hands. In retail FX there is no central exchange, so MT5 supplies tick volume — how many times the price changed during the bar. That tracks activity reasonably well, but it is a different quantity, and it varies between brokers because it depends on their price feed.

In MQL5 the call is iMFI(symbol, period, ma_period, applied_volume) and it returns a handle to a single buffer. The last argument is a volume type (VOLUME_TICK or VOLUME_REAL), not an applied price — there is no price selector, because typical price is part of the definition.

One consequence of the shared shape is worth stating: sharing a scale with RSI does not mean sharing its thresholds. MFI is conventionally read at 80 and 20 rather than 70 and 30 precisely because the volume weighting changes how far the readings travel. The Ultimate Oscillator is the same lesson taken further — it runs 0 to 100, is drawn with RSI’s own 70 and 30 lines, and measured across identical series spends 1.13% of its time above 70 where RSI(14) spends 4.94%. Whenever two oscillators share a range, the thresholds still have to be measured rather than assumed.

Segnali

I segnali distinti e testabili che MFI fornisce — e il regime di mercato adatto a ciascuno.

Overbought / Oversold

Pronto nel Builder

Condizione: MFI moves above 80 or below 20
Regime migliore: Ranging markets
Uso tipico: Fade the extreme — with a volatility or trend filter

Centreline Cross

Pronto nel Builder

Condizione: MFI crosses 50
Regime migliore: Trending markets
Uso tipico: Flip flow bias without waiting for an extreme

Divergence

Logica avanzata

Condizione: Price makes a new extreme, MFI does not
Regime migliore: Trend exhaustion
Uso tipico: Read a move that price is making without participation

Failure to Confirm

Logica avanzata

Condizione: A breakout in price with MFI staying mid-range
Regime migliore: Breakout filtering
Uso tipico: Question a break that nobody joined

Implementazione MT5

Ciò che MetaTrader 5 calcola e disegna davvero: il riferimento di ogni regola di questa pagina.

Buffer

Indice	Buffer	Disegnato in MT5 come	Cosa contiene
0	MAIN_LINE	Line	The MFI value, 0–100. One buffer only — there is no signal line.

Note sulla piattaforma

Funzione MQL5

iMFI

Prezzo applicato

Questo indicatore non accetta l'argomento del prezzo applicato.

Nel Builder

iMFI takes no applied-price argument. It uses typical price internally and takes a volume-type argument instead — VOLUME_TICK or VOLUME_REAL. The Builder's MFI node uses VOLUME_TICK, which is the only volume most FX brokers supply.

Note di implementazione

iMFI publishes one buffer and no signal line, so an MFI rule is one node plus a Compare against a level you choose.
The volume type is an argument to the indicator, not a node setting you can ignore — the Builder passes VOLUME_TICK because that is what an FX feed provides.
Divergence and 'a breakout nobody joined' both need multi-bar comparison between price structure and the oscillator, which the node palette does not express.

Funziona meglio / usare con cautela

Nessun indicatore ha un vantaggio universale. Ecco dove MFI aiuta — e dove inganna.

Funziona meglio

Instruments with meaningful volume
Ranging markets
As a participation cross-check
With a volatility filter

Usare con cautela

FX, where volume is tick count
Extremes as standalone entries
Strong one-way trends
Comparing MFI across brokers

Crea una strategia MFI

Collega il segnale alle regole di ingresso e uscita, poi esporta un EA MT5 compilabile — senza codice.

MFI (14)
Fast StdDev (10) below slow StdDev (40)
MFI below 20 in a quiet market → Open Buy · SL 40 / TP 80
MFI above 80 in a quiet market → Open Sell

Combina MFI con altri indicatori

Un indicatore raramente funziona da solo. Questi abbinamenti coprono i punti ciechi di MFI.

MFI + Standard Deviation

MFI below 20
Fast StdDev below slow
Buy

Perché: Only fade a flow extreme while dispersion is contracting, because mean reversion needs a market that is not expanding away from you
Regime migliore: Ranging

Crea questa strategia →

MFI + RSI

RSI < 30
MFI > 40
Question the signal

Perché: Compare a volume-weighted reading against an unweighted one — when they disagree, the difference is participation
Regime migliore: Either regime

No single-flow template pairs MFI with RSI. Start from MFI + StdDev and add an RSI node with its own Compare.

Apri il Builder →

MFI + Bollinger Bands

Price at lower band
MFI below 20
Buy

Perché: Require price to be statistically stretched at the same moment flow is one-sided, so two independent conditions have to agree
Regime migliore: Ranging

No single-flow template pairs MFI with Bollinger Bands. Start from MFI + StdDev and add band nodes with a Price node into a Compare.

Apri il Builder →

Parametri

Valori iniziali da validare sulla tua coppia e timeframe — non sono impostazioni garantite.

Parametro	Predefinito	Intervallo di test suggerito	Cosa fa
Period	14	7–30	How many bars of money flow are summed. 14 mirrors RSI's default; longer periods make extremes rarer and more meaningful.
Overbought / Oversold	80 / 20	70–90 / 10–30	Your levels, not indicator inputs — iMFI has no threshold argument. Note these are wider than RSI's conventional 70/30.
Volume type	Tick volume	Tick / Real	Which volume feeds the weighting. VOLUME_REAL exists in MQL5 but most FX brokers do not supply it, so VOLUME_TICK — the number of price changes — is what you get in practice.
Shift	0	0–3	Which bar back the value is read from. Shift 1 compares against a fully closed bar.

Preset iniziali

Reactive 7 Frequent extremes

Standard 14 The Builder template's baseline

Smooth 28 Rare, swing-level readings

Esempi di mercato

Dove MFI funziona, dove fallisce e come un filtro cambia il risultato.

Funziona

Flow extreme in a quiet market

MFI drops under 20 while dispersion is contracting, and the fade back toward the middle plays out — the configuration the template trades.

Fallisce

Extreme during an expansion

MFI hits 20 as the market accelerates away. The reading is correct — flow really is one-sided — and fading it means standing in front of the move.

Filtrato

Dispersion filter suppresses the trade

The same extreme appears while the short-window standard deviation is above the long one, the entry is skipped, and the move continues.

Indicatori correlati

RSI Vedi la guida →

Standard Deviation Vedi la guida →

Bollinger Bands Vedi la guida →

Ultimate Oscillator Vedi la guida →

FAQ

Is MFI just RSI with volume?: Close, but two things differ. MFI weights each bar's flow by volume, and it is defined on typical price rather than the close. Where the two disagree, the gap is telling you that the price move and the participation behind it are not aligned — which is the whole reason to run MFI instead of RSI.
Does MFI work in forex?: With a caveat. FX has no central exchange and most brokers report tick volume — the number of price changes in a bar — rather than traded size. That is a reasonable activity proxy and MFI remains usable, but the readings are broker-specific and 'money flow' is a metaphor rather than a measurement. On instruments with real exchange volume the indicator does what its name says.
Why are the levels 80 and 20 instead of 70 and 30?: Convention, and it reflects that MFI moves further than RSI on the same data because the volume weighting amplifies active bars. They are your levels either way — iMFI takes no threshold argument — so test them rather than inheriting them.
Can I use real volume instead of tick volume?: MQL5 supports it: iMFI takes an applied-volume argument that accepts VOLUME_REAL. Whether you get anything back depends on the broker and the instrument. On most retail FX feeds real volume is absent or zero, which is why the Builder uses VOLUME_TICK.
Can I build an MFI EA without coding?: Yes for level rules and centreline crosses — one MFI node plus a Compare, with the period as an EA input. The MFI + Standard Deviation template also shows the dispersion filter that makes a fade survivable. Divergence and 'a breakout with no participation' are the exceptions and need custom MQL5.
How should I validate settings before going live?: Backtest on quality tick data first, then run the EA on a demo account before risking money. With MFI specifically, remember the tick-volume caveat — a strategy tuned on one broker's tick counts may behave differently on another's. When optimising, hold back data the search never saw.

Glossary

Termini chiave

Backtest Overfitting Volatilità