Use calculate to filter data based on date column

gavin007 
In your pbix, the way you calculate the Current week gives Week Start date = 2021/11/29.
It seems to me that the current week should start on 2021/11/22 based on your calendar table?

The table Fact COmbined Agg doesn't have any data for 2021. Its kinda difficult for us to help you.

You can use a variable to find what is the current week based on Today's date, then calculate the Volume for this week.

Volume_Current =
VAR _CurrentWeek = 
    CALCULATE (
        SELECTEDVALUE ( 'Actual Date'[Start Date of Week] ),
        REMOVEFILTERS ( 'Actual Date' ),
        'Actual Date'[Date] = TODAY ()
    )
RETURN
CALCULATE(
	SUM( 'Facts Combined_Agg'[Transaction Volume Amount] ),
	'Actual Date'[Start Date of Week] = _CurrentWeek,
	REMOVEFILTERS( 'Actual Date' )
)

If you want to week before the Current one, you can substract 7 days

Volume_Current =
VAR _CurrentWeek = 
    CALCULATE (
        SELECTEDVALUE ( 'Actual Date'[Start Date of Week] ),
        REMOVEFILTERS ( 'Actual Date' ),
        'Actual Date'[Date] = TODAY ()
    )
RETURN
CALCULATE(
	SUM( 'Facts Combined_Agg'[Transaction Volume Amount] ),
	'Actual Date'[Start Date of Week] = _CurrentWeek - 7,   --Substract 7 days for previous
	REMOVEFILTERS( 'Actual Date' )
)