Two date slicers for one visual

Hi Marcoss, to achieve such result you need to work on data model and create a disconnected table of dates (in your case Year-Month). Your final result should be similar to this:

You can create such table using the following expression:

Disconnected Calendar for Fcst = DISTINCT( 'Fact Table'[Year-Month] )

Now, you can build a mesure, which will use a relationship when calculating Sales and the disconnected filter to calculate Fcst:

Difference = 
VAR _DisconnectedMonth = SELECTEDVALUE( 'Disconnected Calendar for Fcst'[Year-Month] ) 
VAR _Sales = SUM( 'Fact Table'[Sales] )
VAR _Forecast = 
    CALCULATE(
        SUM( 'Fact Table'[Forecast] ),
        'Calendar Table'[Year-Month] = _DisconnectedMonth
    )
RETURN _Sales - _Forecast

Here is the final result for comparison of all sales vs fcst of 2022-01:

Remember that diconnected filter should allow only single selection.

You can find a sample *.pbix file here to play around and better understand how it works 🙂