I have a cumulative measure of return that calculates correctly and displays correctly in isolation--when I place the measure in a single line graph, I can vary the starting date via slicer, and the curve always begins from a zero value.
As soon as I place that same measure on a secondary Y axis, its calculation no longer begins at a zero base. It displays as if it had calculating a cumulative value starting from the earliest start date available yet the graph displays data bounded by the same slicer.
See pic below.
All help appreciated.
