Cumulative Sum
The Cumulative Sum tool sums (cumulates) all the previous values with the current value in a visible range.
For the following data: [10, 8, 15, 20, 8, 15]
the Cumulative Sum returns [10, 18, 33, 53, 61, 76]
(see the graph below):
The cumulative
can be enabled in the chart's options using the series.cumulative property or enabled/disabled by the series.setCumulative() method or on all the series belonging to a specific y-axis by the yAxis.setCumulative() method.
With dataGrouping
enabled, default grouping approximation is set to sum.