OK - I think I got the point now. Please study the attached demo. It uses some demo data similar to your screenshot and adds a scrollbar which is adjusted such that only a 12.5 us wide window of the entire data set covering 5 ms is visible. Using the scrollbar the window can be advanced in steps of 12.5 us over the chart. Just for curiosity I added an option to activate other time windows, 25 us and 50 us.
I don't give a deeper explanation here - just see the demo sources, there are lots of comments to explain why I did this and that.