How does Easy Chart know when 2 points should be connected or not?

Hi,

How does the Easy Chart determine when 2 points should be connected?
I know that if you set the Tag History Resolution Mode to Fixed it will use the value specified in Tag History Resolution to plot the line with that many points spread evenly.
However, if you set the Tag History Resolution Mode to Raw then it should only plot the values that are returned from the Historian. How are these being connected?

In my image below I have a tag with some values saved through the historian. However, not all points are connected? Why is that? How is the Easy Chart determining when points should be connected and when they shouldn’t in Raw mode?

Thanks.