IndicatorArea

 using cAlgo.API;
 namespace cAlgo
 {
     // This sample indicator shows how to use IndicatorArea
     [Indicator(IsOverlay = false, TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
     public class IndicatorAreaSample : Indicator
     {
         private TextBlock _indicatorAreaNumberTextBlock;
         protected override void Initialize()
         {
             var grid = new Grid(1, 2)
             {
                 HorizontalAlignment = HorizontalAlignment.Center,
                 VerticalAlignment = VerticalAlignment.Center,
                 BackgroundColor = Color.Gold,
                 Opacity = 0.7,
                 Width = 200
             };
             grid.AddChild(new TextBlock { Text = "Indicator Area #", Margin = 5, FontWeight = FontWeight.ExtraBold, ForegroundColor = Color.Black }, 0, 0);
             _indicatorAreaNumberTextBlock = new TextBlock
             {
                 Margin = 5,
                 Text = Chart.IndicatorAreas.Count.ToString(),
                 FontWeight = FontWeight.ExtraBold,
                 ForegroundColor = Color.Black
             };
             grid.AddChild(_indicatorAreaNumberTextBlock, 0, 1);
             IndicatorArea.AddControl(grid);
             Chart.IndicatorAreaAdded += Chart_IndicatorAreaAdded;
             Chart.IndicatorAreaRemoved += Chart_IndicatorAreaRemoved;
         }
         private void Chart_IndicatorAreaRemoved(IndicatorAreaRemovedEventArgs obj)
         {
             _indicatorAreaNumberTextBlock.Text = Chart.IndicatorAreas.Count.ToString();
         }
         private void Chart_IndicatorAreaAdded(IndicatorAreaAddedEventArgs obj)
         {
             _indicatorAreaNumberTextBlock.Text = Chart.IndicatorAreas.Count.ToString();
         }
         public override void Calculate(int index)
         {
         }
     }
 }

 import clr
 clr.AddReference("cAlgo.API")
 from cAlgo.API import *
 class Test():
     def get_text_block(self, text):
         textBlock = TextBlock()
         textBlock.Margin = Thickness(5)
         textBlock.Text = text
         textBlock.FontWeight = FontWeight.ExtraBold
         textBlock.ForegroundColor = Color.Black
         return textBlock
     def update_indicators_area_count(self):
         self.indicatorAreaNumberTextBlock.Text = str(api.Chart.IndicatorAreas.Count)
     def initialize(self):
         grid = Grid(1, 2)
         grid.HorizontalAlignment = HorizontalAlignment.Center
         grid.VerticalAlignment = VerticalAlignment.Center
         grid.BackgroundColor = Color.Gold
         grid.Opacity = 0.7
         grid.Width = 200
         grid.AddChild(self.get_text_block("Indicator Area #"), 0, 0)
         self.indicatorAreaNumberTextBlock = self.get_text_block(str(api.Chart.IndicatorAreas.Count))
         grid.AddChild(self.indicatorAreaNumberTextBlock, 0, 1)
         api.IndicatorArea.AddControl(grid)
         api.Chart.IndicatorAreaAdded += lambda _: self.update_indicators_area_count()
         api.Chart.IndicatorAreaRemoved += lambda _: self.update_indicators_area_count()