ChartElliottTriangle

 using cAlgo.API;
 namespace cAlgo
 {
     // This sample shows how to use Chart.DrawElliottTriangle method to draw an Elliott Triangle Wave
     [Indicator(IsOverlay = true, TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
     public class ElliottTriangleSample : Indicator
     {
         protected override void Initialize()
         {
             var i = Chart.FirstVisibleBarIndex;
             var s = (Chart.LastVisibleBarIndex - i) / 6;
             var t = Bars.OpenTimes;
             var c = Bars.ClosePrices;
             Chart.DrawElliottTriangle("Triangle",
                 new ChartPoint(t[i], c[i]),
                 new ChartPoint(t[i + s], c[i + s]),
                 new ChartPoint(t[i + 2 * s], c[i + 2 * s]),
                 new ChartPoint(t[i + 3 * s], c[i + 3 * s]),
                 new ChartPoint(t[i + 4 * s], c[i + 4 * s]),
                 new ChartPoint(t[i + 5 * s], c[i + 5 * s]),
                 Color.Green);
         }
         public override void Calculate(int index)
         {
         }
     }
 }

 import clr
 clr.AddReference("cAlgo.API")
 from cAlgo.API import *
 class Test():
     def initialize(self):
         i = api.Chart.FirstVisibleBarIndex
         s = (api.Chart.LastVisibleBarIndex - i) // 6
         t = api.Bars.OpenTimes
         c = api.Bars.ClosePrices
         triangle = api.Chart.DrawElliottTriangle("Triangle",
             ChartPoint(t[i], c[i]), ChartPoint(t[i + s], c[i + s]), ChartPoint(t[i + 2 * s], c[i + 2 * s]),
             ChartPoint(t[i + 3 * s], c[i + 3 * s]), ChartPoint(t[i + 4 * s], c[i + 4 * s]), ChartPoint(t[i + 5 * s], c[i + 5 * s]),
             Color.Green)
         triangle.IsInteractive = True