It should be possible to disable zoomType, but allow pinchType, when chart is generated for mobile devices.
If zoomType is disabled, then pinchType option doesn't matter.
Demo: http://jsfiddle.net/nnuhLray/ (http://jsfiddle.net/nnuhLray/show)
Edit: May be related to #2168
Absolutely agreed. I ran into this myself .
Better implementation of the `chart.pinchType` option. Allow `pinchTy…
…pe` and `zoomType` to be set independently. When `tooltip.followTouchMove` is true, pinchType only applies to two-finger touches. Closes #5840.