Hi,
I am looking for the Williams MFI indicator he specifies in his book to use on tradestation.
formula is MFI = (High-Low)/Volume

It also uses a histogram using 4 colors to indicate correspondence between volume and MFI direction.

Thanks!

Here are the formulas of the Market Facilitation Index:

https://pdfcoffee.com/qdownload/make-t-facility-index-pdf-free.html