Trying to create a measure that divides the current month value by the last month value.
The catch is that I also want the last month value to be offset by one in the dimension I have for banding (Faixas de atraso).
The desired result is a pivot table like below, where each cell is a division of itself by the number one band above and one month prior.
In the highlighted cell, instead of 16, I want it to divide 16 by 36 (# from 2017-Nov's "1-30" band)
I think I need a combination of Above() and/or Before(), but I'm not sure.