These pages outline the chart configuration options, and the methods and properties of Highcharts objects.
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If no x values are given for the points in a series, pointInterval
defines the interval of the x values. For example, if a series
contains one value every decade starting from year 0, set
pointInterval to 10. In true datetime axes, the pointInterval
is set in milliseconds.
It can be also be combined with pointIntervalUnit to draw irregular
time intervals.
If combined with relativeXValue, an x value can be set on each
point, and the pointInterval is added x times to the pointStart
setting.
Please note that this options applies to the series data, not the interval of the axis ticks, which is independent.