These pages outline the chart configuration options, and the methods and properties of Highcharts objects.
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Applies only when the axis type is category. When uniqueNames
is true, points are placed on the X axis according to their names.
If the same point name is repeated in the same or another series,
the point is placed on the same X position as other points of the
same name. When uniqueNames is false, the points are laid out in
increasing X positions regardless of their names, and the X axis
category will take the name of the last point in each position.