This allows to set x min/max for explicit equation. Introduced to fix the issue with spline interpolation - the problem was that it continued before and after the x range of original series.
For record, this is now my code that has some series "smoothed" (when xy.kind == 2)
I will revert this change, as the way to limit a data series is using DataXRange.
An example of it is in ScatterCtrl/Data analysis/Operations.
Green plot source is the original blue plot, filtered by DataXRange with the limits set in the "Conditions" fields.
As soon as possible I will include an example.