IndicatorAreaRemovedEventArgs

using cAlgo.API;

namespace cAlgo
{
    // This example shows how to use the IndicatorAreaRemovedEventArgs
    public partial class IndicatorAreaRemovedEventArgsSample : Indicator
    {
        protected override void Initialize()
        {
            ShowIndicatorAreasCount();

            Chart.IndicatorAreaRemoved += Chart_IndicatorAreaRemoved;
        }

        private void Chart_IndicatorAreaRemoved(IndicatorAreaRemovedEventArgs obj)
        {
            Print("An indicator area has been removed");

            ShowIndicatorAreasCount();
        }

        private void ShowIndicatorAreasCount()
        {
            var text = string.Format("Indicator Areas #: {0}", Chart.IndicatorAreas.Count);

            Chart.DrawStaticText("text", 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):
        self.show_indicator_areas_count()
        api.Chart.IndicatorAreaRemoved += self.on_chart_indicator_area_removed

    def on_chart_indicator_area_removed(self, args):
        print("A new indicator area has been removed")
        self.show_indicator_areas_count()

    def show_indicator_areas_count(self):
        api.Chart.DrawStaticText("text", f"Indicator Areas #: {api.Chart.IndicatorAreas.Count}", VerticalAlignment.Top, HorizontalAlignment.Right, Color.Red)

{
  "AccessRights": "None",
  "TimeZone": "UTC",
  "IsOverlay": true
}