Adding 2nd line to line chart based on same table (but different filter context)

Fantastic parry2k, just what I needed! This community is great.

Just to help those who might read this later, here's what I did to solve my problem:

1. Created a new (disconnected) table with just the list of the Event names: CompEventsList = VALUES(AllPerformances[EventName])
   • This allowed me to have a second slicer on the same page with the same set of Event names but completely independent of the slicer that is controlling the rest of the visuals on the page.
2. Created a new measure that uses the same measure as in the line chart for the main event but changing the conext to the second table using TREATAS:
   • Comparison Event Running Total = CALCULATE( [Main Event Running Total], TREATAS( VALUES( CompEventsList[EventName] ), AllPerformances[EventName] ))
3. Add the measure above to my line chart