How to Calculate and show value for 2 days prior based on Date Filter

[MEEnergy]

I have a report that need to always show the previous 2 days value based on a date selection filter.  For example, if the user filters the report for 2/10/2019, the value should be calculated for 2/8/2019.  
I have been able to get this to work using the today() functions but I need this to look back 2 days prior based on any date selection.  
The below code works
CALCULATE([CI],Dim_Date[Date] = TODAY()-2)

I would need it to calculate this way but it is not working correctly

CALCULATE([CI],Dim_Date[Date]-2)

[MEEnergy]

Exactly what I needed.  Thanks!

[v-yuezhe-msft · Accepted solution]

@MEEnergy ,

Please change your DAX to the following:

Measure = 
VAR  SelectedDate = SELECTEDVALUE(Dim_Date[Date])

RETURN CALCULATE([CL],Yourtable[Date]=SelectedDate-2)

Regards,
Lydia