These pages outline the chart configuration options, and the methods and properties of Highcharts objects.
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Whether to stack the values of each series on top of each other.
Possible values are
undefined to disable,
"normal" to stack by
"percent". When stacking is enabled, data must be sorted
in ascending X order. A special stacking option is with the
streamgraph series type, where the stacking option is set to
"stream". The second one is
"overlap", which only applies to