The Market Facilitation Index (MFI) is a technical indicator developed by Bill Williams which analyzes the change in the price of a financial asset in connection with its trading volume, ie analyzing the change in price for each volume unit.
In much simpler words, the Market Facilitation Index (MFI) is an indicator based on the trading volume in the market. The difference between the MFI and the traditional volume indicator is that it does not take into account variations in prices, it only takes into account the number of shares or contracts that are traded in a market. The market facilitation index goes further. That is, it takes into account price variations and, at the same time, the volume traded.