The money flow index is an oscillator that ranges from 0 to 100. It is used to show the money flow over several days. The higher the MFI reading, the stronger the flows of capital into a particular instrument in the most recent past. The lower the reading, the greater the exodus of capital from the instrument. The MFI however can also be used as a contrarian indicator, where strong flows can be seen as crowded trades and weak flows can be seen as unloved assets which may in the near set up a bullish reversal.