M-t-t-h

Results 2 issues of M-t-t-h

## Type of issue [ ] Bug [X ] Question (e.g. about handling/usage) [X ] Request for new feature/improvement ## Expected Behavior First, thanks for this code, it's great work...

Hy, I get a unexpected zoom on any event on chart. After analyse, the function getZoomLevel return 'Infinity'. I tried many way to resolve it with set min/max, check datas,...