navigator.series.stack Boolean|String|Object
(default: false)
A boolean value indicating if the series should be stacked. A string value is interpreted as navigator.series.stack.group.
The
stack
options is supported when navigator.series.type is set to "bar", "column", "line", "area", "verticalLine", "verticalArea", "radarLine", "radarArea" and "radarColumn".Stack settings of the first series are applied to the rest of the series.