Generate Cumulative Count Tooltips over missing inputs

Hi northcity4, 

Thank you for reaching out to the Microsoft fabric community forum. Also thanks Greg_Deckler, for his inputs on this thread. I reproduced the scenario, and it worked on my end. I used my sample data and successfully implemented it.

Dax Measure for Cumulative Count:

Cumulative Count =

VAR CurrentX = SELECTEDVALUE('Dim_X'[Value])

RETURN

CALCULATE(

    SUM('fact_events'[cnt_flag]),

    FILTER(

        ALLSELECTED('fact_events'),

        'fact_events'[x_value] <= CurrentX

    )

)

Outcome:

I am also including .pbix file for your better understanding, please have a look into it:

Hope this helps clarify things and let me know what you find after giving these steps a try happy to help you investigate this further.

Thank you for using the Microsoft Community Forum.