Hi There,
I just got in touch with jqxchart and noticed the same thing!
On mobile devices (androids, iOS) it is not possible to scroll. I was trying to put another div in front of it, and it would work, but it’s very uncomfortable to build and tooltip is (obviously) not shown anymore.
So I guess the function about swipe-detecting is causing some trouble. where exactly is this functionality defined? Or another question: will you add the option to turn ’em off in the near future?
I would really appreciate it! 
Best Regards,
Steven