Plot horizontal line

[ssg10]

How can I plot a horizontal line in indicator?

I know I have to add this below at initialize, but what is next?

protectedoverridevoid Initialize()
{
Add(new Plot(Color.Orange, PlotStyle.Hash, "L2"));

....
}

[NinjaTrader_Bertrand]

This would just define your Plot, you still would need to set it to some value...this is easier for a line at a certain level -

 
Add(new Line(Color.Blue, 0, "Zerolevel"));