Welcome to the Highcharts Stock JS (highstock) Options Reference

These pages outline the chart configuration options, and the methods and properties of Highcharts objects.

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Defines if cumulation should start from the first point within the visible range or should start from the last point before the range.

In other words, this flag determines if first point within the visible range will start at 0 (cumulativeStart=true) or should have been already calculated according to the previous point (cumulativeStart=false).