ChartIcon

 using cAlgo.API;
 namespace cAlgo
 {
     // This sample indicator shows how to use Chart.DrawIcon method to draw icons
     [Indicator(IsOverlay = true, TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
     public class ChartIconSample : Indicator
     {
         protected override void Initialize()
         {
             for (int i = Chart.FirstVisibleBarIndex; i <= Chart.LastVisibleBarIndex; i++)
             {
                 var iconName = string.Format("Icon_{0}", i);
                 if (Bars.ClosePrices[i] > Bars.OpenPrices[i])
                 {
                     Chart.DrawIcon(iconName, ChartIconType.UpArrow, i, Bars.LowPrices[i], Color.Green);
                 }
                 else
                 {
                     Chart.DrawIcon(iconName, ChartIconType.DownArrow, i, Bars.HighPrices[i], Color.Red);
                 }
             }
         }
         public override void Calculate(int index)
         {
         }
     }
 }

 import clr
 clr.AddReference("cAlgo.API")
 from cAlgo.API import *
 class Test():
     def initialize(self):
         for i in range(api.Chart.FirstVisibleBarIndex, api.Chart.LastVisibleBarIndex):
             iconName = f"Icon_{i}"
             if api.Bars.ClosePrices[i] > api.Bars.OpenPrices[i]:
                 api.Chart.DrawIcon(iconName, ChartIconType.UpArrow, i, api.Bars.LowPrices[i], Color.Green)
             else:
                 api.Chart.DrawIcon(iconName, ChartIconType.DownArrow, i, api.Bars.HighPrices[i], Color.Red)