You have different way to do it
First you can shared the time axes like in example:
http://codepen.io/plotly/pen/512907ea876ab7026439eb3416b83b80
In this case if you move of one of the subplots the others move as well.
If you want to show on mousehover all the solution here the other fiddle:
http://codepen.io/Narghast/pen/pypRxG
I hope that this can help you!