This will likely break many of the other things you have done,
but is there feasibility in pivoting all your providers into one column:
Then the line graph can be pivot values, and all the volumes can be
area charts. There will likely need to be some other calculations
to get other things: IF [Pivot Field Name] = "Kraken" THEN ...
So maybe too much extra work.
But In Prep, you can do the pivoting and make your data source for this graph
and make an unpivoted output for the other graphs.
Just an idea, not sure if it is feasible.
Please see workbook v18.1 attached in the Forum Thread.
283913area.twbx 298.6 KB