Button

 using cAlgo.API;
 using System;
 using System.Linq;
 namespace cAlgo
 {
     // This sample indicator shows how to use Button control and handle its clicked event
     [Indicator(IsOverlay = true, TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
     public class ButtonSample : Indicator
     {
         protected override void Initialize()
         {
             var stackPanel = new StackPanel
             {
                 HorizontalAlignment = HorizontalAlignment.Center,
                 VerticalAlignment = VerticalAlignment.Center,
                 BackgroundColor = Color.Gold,
                 Opacity = 0.7
             };
             for (int i = 0; i < 5; i++)
             {
                 var button = new Button
                 {
                     Text = "Button #" + i,
                     Margin = 10
                 };
                 button.Click += Button_Click;
                 stackPanel.AddChild(button);
             }
             Chart.AddControl(stackPanel);
         }
         private void Button_Click(ButtonClickEventArgs obj)
         {
             var textSplit = obj.Button.Text.Split(' ').TakeWhile(text => !text.Equals("Clicked", StringComparison.OrdinalIgnoreCase)).ToArray();
             obj.Button.Text = string.Join(" ", textSplit) + " Clicked";
         }
         public override void Calculate(int index)
         {
         }
     }
 }

 import clr
 clr.AddReference("cAlgo.API")
 from cAlgo.API import *
 class Test():
     def initialize(self):
         stackPanel = StackPanel()
         stackPanel.HorizontalAlignment = HorizontalAlignment.Center
         stackPanel.VerticalAlignment = VerticalAlignment.Center
         stackPanel.BackgroundColor = Color.Gold
         stackPanel.Opacity = 0.7
         for i in range(5):
             button = Button()
             button.Text = f"Button # {i}"
             button.Margin = Thickness(10)
             button.Click += self.on_button_clicked
             stackPanel.AddChild(button)
         api.Chart.AddControl(stackPanel)
     def on_button_clicked(self, args):
         textSplit = args.Button.Text.split(' ')[:2]
         args.Button.Text = f"{" ".join(textSplit)} Clicked"