Remove certain values from denominator in Measure once X value gets to a certain level

Hi, NewAnalyst16 ;

You could modify Survival Curve measure as follows:

Survival Curve =
1
    - (
        DIVIDE (
            CALCULATE (
                SUM ( 'Attrition Query'[Churn] ),
                FILTER (
                    ALLSELECTED ( 'Attrition Query'[Current Day] ),
                    ISONORAFTER (
                            'Attrition Query'[Current Day], MAX ( 'Attrition Query'[Current Day] ), DESC
                    )
                ),
                FILTER (
                    ALLSELECTED ( 'Attrition Query'[Current Day] ),
                    'Attrition Query'[FLOW_END_DATE] <= TODAY ()
                )
            ),
            CALCULATE (
                COUNT ( 'Attrition Query'[BSCustomerID] ),
                ALLSELECTED ( 'Attrition Query'[Current Day] )
            )
        )
    )

Here I have added an additional filter condition, which may be consistent with the idea of DateDifferences less than the Current Day, you could try it.

If it not right, please provide me with more details about your table  or share me with your pbix file after removing sensitive data.

Best Regards,
Community Support Team_ Yalan Wu
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