Hi Experts,
I have a Chart with a rather narrow total Y-Range: 
-6.2E-12 ... 2.13E-10

When I use the normal zoom, the zoom is not recognized in the OnDataZoom_EndDrag event:

rangeTotal = oChart.Axis(StandardAxis.PrimaryY).ViewRange;
rangeZoomed = oChart.Axis(StandardAxis.PrimaryY).Scale.RulerRange;

now rangeTotal  and rangeZoomed  have both the same values (Y-Min and Y-Max for the total range).
When the Y-Range is better scaled (lets say from -10 ... 10) there is no problem, the rangeZoomed shows the mouse zoomed coordinates. 
What can I do to make the zoom work even for very small total axis ranges ?

Thanks for your help,
best regards,
Joern