The filledAccumulative Line chart setting

This page shows how the setting filledAccumulative affects your charts. The first chart shown below has it enabled (the default), so the lines, in effect, sit on top of each other. The second chart has the setting set to false so the points are drawn "as-is", ie not accumulatively. The first chart could be more useful if you wish to see totals, whereas the second chart below might be better if you want to see individual values.

Keep in mind that if you choose to use a non-accumulative chart the colors may be better as semi-transparent ones, otherwise parts or all of some lines may get hidden by others.