cTrader ATR Indicator

using cAlgo.API;
using System.Windows.Forms;

namespace cAlgo
{
    [Indicator(IsOverlay = true, TimeZone = TimeZones.UTC, AccessRights = AccessRights.FullAccess)]
    public class ClickAlgoIndicator : Indicator
    {
        [Parameter(DefaultValue = 0.0)]
        public double Parameter { get; set; }

        [Output("Main")]
        public IndicatorDataSeries Result { get; set; }


        protected override void Initialize()
        {
            var ret = MessageBox.Show("It is not possible to download the software from the cTDN website. Would you like to visit us at ClickAlgo.com where you can download it?", "Downloading...", MessageBoxButtons.YesNo, MessageBoxIcon.Information);

            if (ret == DialogResult.Yes)
            {
                System.Diagnostics.Process.Start("https://clickalgo.com/average-true-range-indicator");
            }
        }

        public override void Calculate(int index)
        {
            // Calculate value at specified index
            // Result[index] = ...
        }

    }
}