New Post: Fill area above and below baseline

Currently we did it with 2 area series. One is above baseline, one is below. For me it looks like an AreaSeries with BaseLine. Probably BaselineAreaSeries?
Yes it is two AreaSeries and one is LineSeries, user of this type of graph should now only about LineSeries, and two Colors below and above Baseline and the coordinate of this base line if it is horizontal it will be vertical coordinate for example BaseLineY