I have a dynamic table in Google Sheets that has, among other irrelevant columns, column B that has done various calculations and resulted in either TRUE or FALSE for each row in B4:B500 (the first three rows are headers and summaries).

What I would like is to be able to calculate in another column (C would be good!) how many TRUEs there have been so far (top down) in the current streak and, when B changes to FALSE, do the same thing, resetting back to 1 at each change in B's value.

Here is a link to example of my data (sorry, rep<10 so can't just post the image):