Rolling by Week

Hi Henrik,

I have another approach which looks a little bit more complex in the first place but it also covers the correct calculation when the year changes if this is a requirement in your case:

Rolling weeks incl change of year = 
var var_EndDate = MAX('Dim Date'[Date])
var var_WeekDayNumber = CALCULATE(SELECTEDVALUE('Dim Date'[WeekDayNum]),'Dim Date'[Date] = var_EndDate)
var var_StartDate = var_EndDate - var_WeekDayNumber + 1

var Result =
CALCULATE(
    SUM(FactOnlineSales[SalesAmount]),
    ALL('Dim Date'),
    DATESBETWEEN('Dim Date'[Date],var_StartDate,var_EndDate)
)

RETURN
Result

Please find below the result.

Best regards

Michael

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