Series and Renderable Series

Hello guys,

Do series have some property of it renderable type?
I founded in ‘AddRemoveSeries’ example this line

// dataSeries.RenderAs = new LineSeries() { SeriesColor = DataManager.Instance.GetRandomColor() };

Or can you tell how can i add/remove/change series and its renderable style dinamically ?

Im using this code to replace series

void Create (OhlcDataSeries<DateTime, double> ser, SeriesType s …)
{
var renderseries = new FastCandlestickRenderableSeries { };
ChartControl.RenderableSeries.Add(renderseries);
ChartData.Add (ser);
}

void Replace (OhlcDataSeries<DateTime, double> ser, …)
{
int k = GetIndex ();

 ChartData.RemoveAt(k);
 ChartControl.RenderableSeries.RemoveAt (k);
 Create (ser, type ..);

}

Is it right way? looks like pornography
I think there will be some problems with overview
Example:
we got 2 series (price(candles) and ema (line)) overview shows price chart and after we change price series type to line, overview will show ema series, not price