Dynamic Selection N Days Prior to Date

[Al345]

I have a dataset that has a table of records with start and end dates and a period table that has the start and end dates of each period. I have a set of flag measures that creates a dynamic filter to show only active records that fit between a selected start and end date. Now what I need to do is have another option for the user to select N days before the start of the period and show active records based on that. I've been trying to use something like this: 

Measure = DATEADD(Calendar[Date], SelectedValue(NDays), DAY)

*NDays would be the value a user would select in a slicer

So far this hasn't worked for me but I'm sure there is a way to do this. Any ideas? 

[v-diye-msft]

Hi @Al345 

If you've fixed the issue on your own please kindly share your solution. if the above posts help, please kindly mark it as a solution to help others find it more quickly.thanks!

[Ashish_Mathur]

Hi,

See if my solution here helps.

[amitchandak · Accepted solution]

You can have measure like

10 Days behind Sales = CALCULATE(SUM(Sales[Sales Amount]),dateadd('Date'[Date],10,DAY))

You can use what if measure

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

N Days behind Sales =

var _max =max(Whatif[Whatifmeasure])

return

CALCULATE(SUM(Sales[Sales Amount]),dateadd('Date'[Date],_max,DAY))