Please Help! For each Serial Number i need to count the days its consecutively Active

Hi LynnG ,

I have created a simple sample, please refer to it to see if it helps you.

Create measures.

flag =
VAR _a =
    CALCULATE (
        MAX ( 'Table'[summary_date] ),
        FILTER (
            ALLEXCEPT ( 'Table', 'Table'[Serial Number] ),
            [summary_date] < MAX ( 'Table'[summary_date] )
        )
    )
VAR _b =
    MAX ( 'Table'[summary_date] ) - 1
RETURN
    IF ( _a <> _b, 0, 1 )

minflagdate = 
CALCULATE (
    MAX ( 'Table'[summary_date] ),
    FILTER (
        ALLSELECTED ( 'Table' ),
        'Table'[summary_date] <= SELECTEDVALUE ( 'Table'[summary_date] )
            && [flag] = 0
            && 'Table'[Serial Number] = SELECTEDVALUE ( 'Table'[Serial Number] )
    )
)

result = DATEDIFF([minflagdate],MAX('Table'[summary_date]),DAY)+1

How to Get Your Question Answered Quickly 

If it does not help, please provide more details with your desired output and pbix file without privacy information (or some sample data) .

Best Regards
Community Support Team _ Polly

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.