Rolling 13 periods without a structured date column

Hi MalavikaUB ,

Please try this way:
Use this DAX to create a new measure:

SelectedFlag = 
VAR Current_Year = SELECTEDVALUE(CurrentYear[CurrentYear])
VAR Current_Period = SELECTEDVALUE(CurrentPeriod[CurrentPeriod])
VAR CurrentPeriodNumber = (Current_Year * 100) + Current_Period
VAR MinPeriodNumber = CurrentPeriodNumber - 100
RETURN
IF(
    NOT ISBLANK(Current_Year) && NOT ISBLANK(Current_Period),
    IF(
        (SELECTEDVALUE('Table'[FiscalYear]) * 100 + SELECTEDVALUE('Table'[FiscalPeriod])) > MinPeriodNumber && 
        (SELECTEDVALUE('Table'[FiscalYear]) * 100 + SELECTEDVALUE('Table'[FiscalPeriod])) <= CurrentPeriodNumber,
        1,
        0
    ),
    BLANK()
)

The results are shown below:

Best Regards,
Dino Tao
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