Navigator works great. Pan and Zoom work great. But when you try both on the page zooming and panning completely mess up the data navigator. I realize pan and zoom are new so maybe this is already in the works. My support ticket pointing out the problem: http://www.telerik.com/account/support-tickets/view-ticket?threadid=1013202
Sorry, I should have said the data navigator is the range that shows below Stock charts. I have a very large data set (16 years) so showing that with line graphs works great, except when trying to add zooming and panning.