Last N Months Measures

[Anonymous]

Hello!

I have a Measure called NPS Score. This score is calculate liked this:

NPS Score =
var PromoterDetractor =
CALCULATE(Detail[Total Surveys],FILTER(Detail,Detail[Recommend Rating] = "Promoter")) - CALCULATE(Detail[Total Surveys],FILTER(Detail,Detail[Recommend Rating] = "Detractor"))

var Percentage =
divide(100,Detail[Total Surveys])

RETURN
PromoterDetractor * Percentage

I would like to have a table chart that looks like this:

I am struggling figuring out how to do this. I would like the NPS score as of what whatever the N filter would indicate. How do you create a Measure for that? Thank you!

[amitchandak · Accepted solution]

@Anonymous , You can use a what if parameter

https://docs.microsoft.com/en-us/power-bi/desktop-what-if

you will get what measure

What if meausre  = selectedvalue(param[param])

example , the new measure

Rolling N = CALCULATE([NPS Score],DATESINPERIOD('Date'[Date ],MAX('Date'[Date ]),-1 * [What if meausre],MONTH))