> For the complete documentation index, see [llms.txt](https://docs.optionalpha.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.optionalpha.com/technical-documentation/indicators/mfi.md).

# MFI

## MFI

The Money Flow Index (MFI) is a technical indicator that generates overbought or oversold signals using both price and volume data. An MFI reading above 80 is considered overbought and an MFI reading below 20 is considered oversold. MFI levels of 90 and 10 are also used as thresholds.

The source code for the MFI function is available [here](https://app.optionalpha.com/ta/MFI.txt).