DAX COUNTX giving wrong results

Anonymous

try like this:

Bottom Nth Value = 
COUNTROWS(
    FILTER(
        ALL( 'Date Table' ),
        RANKX(
            ALL( 'Date Table' ),
            [TotalValue], , DESC, Dense
        ) < 6
    )
)

Anonymous

For your measure to work you need to remove the filter from  'Year and Month' and from 'Date' such as below:

Bottom 5 =
VAR N = 5
RETURN
    COUNTX (
        SUMMARIZE (
            'Date Table',
            'Date Table'[Year and Month],
            "total", RANKX (
                ALL ( 'Date Table'[Year and Month], 'Date Table'[Date] ),
                CALCULATE (
                    SUM ( Data[Value] )
                ),
                ,
                ASC,
                DENSE
            )
        ),
        IF (
            [total] <= N,
            [total],
            BLANK ()
        )
    )