Running total to show full timeframe (Where there is no data points as well)

[Anonymous]

I have calculated running total using this formula : 

CALCULATE(

    COUNTA('DIM - Analysis'[_id]),

    FILTER(

        ALLSELECTED('DIM - Analysis'[date]),

        ISONORAFTER('DIM - Analysis'[date], MAX('DIM - Analysis'[date]), DESC)

    )

)

but when I am selecting a perticular month on slicer the graph ends at last data points, does not at the end of the selected interval  but I want to show a straight line which will begin from last data points till end of selected interval ends.

here I have selected the month "November". The last data points on the graph I marked was at Nov 24 and graph ends there , I want it to show a straight line till end of Nov.  I have tried but couldn't succeded, It would be great if someone help me pull this off.  Thanks in Advance for helping me 🙂

[lbendlin]

What's the business value of showing a straight line for December?