measure not allowed in legend

[luis_pflucker]

I am trying to build a clustered column chart, and in LEgend field I tried to put a measure, where measure is:

Measure = sum(History[_ReTested (RFRT-Assigned) #])

But Is not allowed to put this measure in LEgend field.

[Greg_Deckler]

@luis_pflucker In general, to use a measure in that way, you need to use the Disconnected Table Trick as this article demonstrates: https://community.powerbi.com/t5/Community-Blog/Solving-Attendance-with-the-Disconnected-Table-Trick...