Money Flow Index (MFI) Indicator
Want the daily routine? Get the free 15-Minute Swing Trader’s Checklist. Get it free →
The Money Flow Index (MFI) is a technical oscillator that combines both price and volume data to identify overbought or oversold conditions in an asset.
It can also detect divergences that signal potential trend reversals.
The MFI is unique because it incorporates volume into its calculations, making it different from other oscillators like the Relative Strength Index (RSI), which only considers price.

How to Calculate the Money Flow Index
- Calculate the typical price for each period.
- Determine if raw money flow is positive or negative by comparing the typical price of the current period with the previous period.
- Multiply the typical price by volume to calculate raw money flow.
- Add up positive and negative money flows over the past 14 periods to find the money flow ratio.
- Calculate the MFI using the money flow ratio.
What the Money Flow Index Tells You
- Overbought and Oversold Signals: An MFI reading above 80 signals that an asset may be overbought, while a reading below 20 suggests it may be oversold. Traders may look for potential reversals after these signals.
- Divergences: If the MFI moves in the opposite direction to the price, it may indicate a potential reversal. For instance, if the MFI declines while the price continues to rise, it could signal a bearish reversal.
Difference Between MFI and RSI
While the MFI incorporates volume into its calculation, the RSI only uses price data. This means that MFI might provide signals faster or more accurately in certain cases since volume is often viewed as a leading indicator.
Limitations of the MFI
- False Signals: The MFI can generate false signals, indicating a potential trade that doesn’t result in the expected price movement.
- Missed Signals: The MFI may not always indicate important market reversals, especially if divergences don’t appear.
Concluding Thoughts
The Money Flow Index (MFI) is a useful tool for traders looking to incorporate volume into their technical analysis.
By offering insights into overbought and oversold conditions, as well as potential divergences, the MFI can help traders spot trends and reversals.
However, like any indicator, it should be used in conjunction with other technical tools to reduce the risk of false signals and improve overall trading strategies.
Want the daily routine? Enter your email for the free 15-Minute Swing Trader's Checklist.
Free 5-page PDF, then occasional trading emails. Education only, not financial advice. Unsubscribe anytime. Kit stores your email in the US: see our privacy policy.
Want to learn the full method? The Trading Mastery Program teaches the 4 strategies I have traded since 2011. It suits beginners and experienced traders.
Rather follow the trades as they happen? Daily Trading Signals is our Telegram channel: my trade ideas with entry, stop and exit, and every trade is public.
Questions about this post? Ask in the free Telegram channel →
Educational content only, not personalised financial advice. Trading carries risk, including loss of capital. Past performance is not indicative of future results. Synapse Trading is not licensed or regulated by MAS.



