Relative time measures with Dynamic Time axis

amitchandak it was not an option since I'm using a live connection to AAS, but I managed to resolve this issue. 

I created a table 'DatesWithPartsYear' that combines dates, DisplayDates, PartOfYear as a seperate table (no connection to the model) and then re-caluclated my measure for this report to.

In DateTable I created additional columns "Year Month" and "Year Quarter" - to follow the same data schema as in DatesWithPartsYear. then in my measers I added TREATAS - to treat my displayDate as a specific column from ch_date depends on context ot PartYear.

Actual = 
SWITCH(
    VALUES ( DatesWithPartsYear[PartYear] ),
    "Month",
        CALCULATE(
            SUM(factTable[Value]),
            factTable[MeasureTypeName] = "Actual",
            TREATAS ( VALUES ( v_DatesWithPartsYear[DisplayDate] ) , dateTable[Year Month])
        ),
    "Quarter",
        CALCULATE(
            SUM(factTable[Value]),
            factTable[MeasureTypeName] = "Actual",
            TREATAS ( VALUES ( DatesWithPartsYear[DisplayDate] ) , dateTable[Year Quarter])
        )
    )