Forecasting using Forecast Measure Totals

DAX DAX Calculations
1

Hi all,
Need a bit of help working this out.
I have a table of Total historical Sales that goes out to June 30 2020, as an example. I want to forecast past this date but instead of using the DateAdd( Dates, -1, YEAR), I would like July 1st Forecast to be an average of the previous 7days Sales. The issue I have is once I go past July 2nd, there is obviously not a full 7 days of historical Sales to calculate the average because the average range will be including July 1st in the range and there is no historical Sales for July 1st, only a Forecasted total using a calculated measure.
Once I get to July 8th, the only data I have for the previous 7 days period is the Forecasted Measure.
Therefore my question is, How do I Forecast out a selected date period using Measure totals or Virtual Data?
I hope this makes sense. Not sure how to best word this question :slight_smile:

2

Sorry I forgot to add, below is the DAX I used to get the previous day 7 for Forecasting.

Forecast Sales =
VAR LastSalesDate = CALCULATE( LASTDATE( tbl_Sales[Date]), ALL( Dates ) )
RETURN
IF( MAX( Dates[Date] ) > LastSalesDate ,
CALCULATE( [Total Sales],
DATEADD( Dates[Date], -7, DAY) ),
BLANK() )

Once I get to July 8th, it obviously does not calculate anything because there is no historical Total Sales.

3

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4

Hi @NeilJ, we’ve noticed that no response has been received from you since the 10th of March.

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