See contribution
https://oxyplot.codeplex.com/SourceControl/network/forks/benjaminrupp/StackedAreaLineSeries/contribution/3929
Alt 1: Implement a new series StackedAreaSeries
Alt 2: Add a IsStacked property to the AreaSeries (similar to BarSeries/ColumnSeries)
The items of the stacked AreaSeries are not required to be aligned in the stacking direction.
It should be possible to stack negative values (same behaviour as in Excel?)
https://oxyplot.codeplex.com/SourceControl/network/forks/benjaminrupp/StackedAreaLineSeries/contribution/3929
Alt 1: Implement a new series StackedAreaSeries
Alt 2: Add a IsStacked property to the AreaSeries (similar to BarSeries/ColumnSeries)
The items of the stacked AreaSeries are not required to be aligned in the stacking direction.
It should be possible to stack negative values (same behaviour as in Excel?)