I had a tough problem to figure out yesterday and no amount of hunting on the internet revealed a solution so here it is: The problem was that the range chart I was using do display data had a time bar on the x axis. The line on the chart did not line up with the time on the x axis. Example below. Looking at Italy notice a tooltip of 20:07:47 but the x axis is lined up almost exactly on 21:00:00. The solution turned out to be on how the chart series is setup. Both the Vertical and Horizontal axis were set to primary. Changing the Vertical axis to secondary solved the problem. Notice now how Italy lines up correctly now. I hope this helps you!