Measures with Different Granularity Functionality

Hi,

I have the following measure:  Weighted Score:=DIVIDE (SUM(X),DISTINCTCOUNT(Y))

when the user is filtering / Displaying the measure on the day level i want it to calculate like the above measure, but if the user filters a time range, lets say one month, i want theDISTINCTCOUNT to be calculated on the day level and then sum up all the days distinct counts as the DIVIDE denominator.

hope i was clear.

Thanks!