Running count total by month (IMPOSSIBLE?)

Hi,

The code below should do the trick.

_RT = 
var _no = CALCULATE(DISTINCTCOUNT(NewTable[i]), ALL(NewTable[i]))
return
COUNTROWS(FILTER(ALL(NewTable), NewTable[imp] = SELECTEDVALUE(NewTable[i]) && [date] <= MAX(NewTable[date]))) / _no

It does require you to transform your table / add a new version of it:

NewTable = CROSSJOIN(SELECTCOLUMNS(VALUES('Table'[imp]),"i", [imp]),'Table')

In this video I show how to create the dashboard as seen below.

Link to the file here. 

Pls mark as solution if so. Thumbs up for the effort are appreciated.

Kind regards, 

Steve.