Runnable sample here : https://mega.nz/#!WBtk2JDY!SBXQMdDL7BIIJ3qWz80-5o6O4l4o-6v9lciYAvEV9w0
In this sample, the two graphs must start at the same time (11/08/2016 09:40:00) but one start at 09:43:30 and the other at 09:56:35.
And the two graphs must to be SYNCHRO (same timeline for both).
Thanks