Cumulative daily average in selected range

Nice! Thanks. It almost worked, although close enough. I had to switch ALL to ALLSELECTED, like so:

From:
Process Score = CALCULATE( CALCULATE(
AVERAGE(fact__scores[Process score]),
USERELATIONSHIP(dim_Calendar[date],fact_scores[Handle Date])
), Filter( all(dim_Calendar) , dim_Calendar[date] <= max(dim_Calendar[date]) )  )

To:
Process Score = CALCULATE( CALCULATE(
AVERAGE(fact__scores[Process score]),
USERELATIONSHIP(dim_Calendar[date],fact_scores[Handle Date])
), Filter( ALLSELECTED(dim_Calendar) , dim_Calendar[date] <= max(dim_Calendar[date]) )  )

End result:

If you want to update the answer, I will mark it as the solution.