ChartTypeEventArgs

 using cAlgo.API;
 namespace cAlgo
 {
     // This example shows how to use the Chart ChartTypeEventArgs
     [Indicator(IsOverlay = true, TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
     public class ChartTypeEventArgsSample : Indicator
     {
         protected override void Initialize()
         {
             Chart.ChartTypeChanged += Chart_ChartTypeChanged;
         }
         private void Chart_ChartTypeChanged(ChartTypeEventArgs obj)
         {
             var text = string.Format("Chart Type Changed To: {0}", obj.Chart.ChartType);
             Chart.DrawStaticText("type", text, VerticalAlignment.Top, HorizontalAlignment.Right, Color.Red);
         }
         public override void Calculate(int index)
         {
         }
     }
 }

 import clr
 clr.AddReference("cAlgo.API")
 from cAlgo.API import *
 class Test():    
     def initialize(self):
         api.Chart.ChartTypeChanged += self.on_chart_type_changed
     def on_chart_type_changed(self, args):
         api.Chart.DrawStaticText("type", f"Chart Type Changed To: {args.Chart.ChartType}", VerticalAlignment.Top, HorizontalAlignment.Right, Color.Red)