fixed position of marker to layout not data-point

[git-vcs]

Hello,
I want to make a swipeable graph view, at the far right of the graph there should be a vertical line with a marker on it. And when I swipe data left and right the marker should always display the current value at this point and the vertical line and marker should not move in x-axis.

In other words the marker/point should not be fixed to one data-point but fixed to the “graph layout/view”. I looked at the example code online but I can't seem to find an exact example, all examples seem to attach marker to a fixed data point in the series. I therefore wonder if this is not possible in this library or perhaps I do not know the correct terminologies for it.

[git-vcs]

I am linking my repost on stack overflow here https://stackoverflow.com/questions/79352618/fixed-position-of-marker-to-layout-not-data-point