Hi,
I want to suggest a new feature:
when zooming on a graph, in the toolbar will appears some buttons (it's better an horizzontal slidebar)
which you can move (with the same zoom) right and left (in the x axis).
To better understand:
- Take a look at this library: http://www.amcharts.com
- And, in particular, this feature http://www.amcharts.com/line/chart-with-scroller
I hope this idea is useful for you,
Thank you for the work.