Conditional formatting for lines in Line Chart

Today, it is impossible to set Conditional formatting for the Lines in Line charts.

We can set rules and assign a Measure to set the color of Column and Bar charts.

But it is impossible to do the same for the lines in Line Charts.

Now we need to add calculated columns to the Data Model, assign colors to these columns, and change the assignment of the values in these columns over time.

This is cumbersome and too complex.

It would be very helpful to assign Conditional formatting to the lines themself directly..