I'm trying to display the value of the last 12 months for a calculated value (Day Payable Outstanding). At every monthyear I don't want to display the value of DPO e.g. Sep '15, but I want to display the value of DPO from Oct '14 to Sep '15.
Is that clear?
As you can se iin my qvw I can calculate the DPO in the "DPO (gg)" chart and I'm trying to calculate the DPO LTM ( last twelve months) in the "DPO LTM(gg)" chart
I tried creating a rolling period but seems that my tentative and the formulas used don't works as well.