using System;
using System.Drawing;
using System.Linq;
using PowerLanguage.Function;

namespace PowerLanguage.Indicator
{
	public class Donchian Channel : IndicatorObject
	{
		public Donchian Channel(object _ctx):base(_ctx)
		{
			n_bars = 5;
		}

        [Input]
        public int n_bars { get; set; }
		
		private IPlotObject plothigh, plotlow;
		
		protected override void Create()
		{
			plothigh = AddPlot(new PlotAttributes("plothigh", EPlotShapes.Line, Color.Red));
			plotlow = AddPlot(new PlotAttributes("plotlow", EPlotShapes.Line, Color.Red));
		}
		
		protected override void StartCalc()
		{
		}
		
		protected override void CalcBar()
		{
			if(Bars.High[5] > 0 && Bars.Low[5] > 0)
			{
				plothigh.Set(Bars.High.Highest(n_bars));
				plotlow.Set(Bars.Low.Lowest(n_bars));
			}
		}
	}
}