These pages outline the chart configuration options, and the methods and properties of Highcharts objects.
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Defines when to display a gap in the graph, together with the gapUnit option.
In case when
dataGrouping is enabled, points can be grouped into a
larger time span. This can make the grouped points to have a greater
distance than the absolute value of
gapSize property, which will result
in disappearing graph completely. To prevent this situation the mentioned
distance between grouped points is used instead of previously defined
In practice, this option is most often used to visualize gaps in time series. In a stock chart, intraday data is available for daytime hours, while gaps will appear in nights and weekends.