RSI indicator line will not display. Please help. I'm still learning how to code.

Hello Good day. 
I just started studying how to code on ctrader. Can you please help me? RSI line will not display. I tried to debug the code but I cant find the error.

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using cAlgo.API;
using cAlgo.API.Collections;
using cAlgo.API.Indicators;
using cAlgo.API.Internals;

namespace cAlgo
{
    //[Levels (30.0, 50.0, 70.0)]
    [Indicator(AccessRights = AccessRights.None)]
    public class RSITELEGRAMALERTS : Indicator
      
    
    {

        #region user settings
        
        [Parameter("Period",Group ="Indicator Data", MinValue =0, MaxValue = 100, DefaultValue = 14)]
        public int Period { get; set; }

        [Parameter("Source", Group = "Indicator Data")]
        public DataSeries Source { get; set; }
      
        [Parameter("UpperThreshold", DefaultValue = 70, Group ="Indicator Data")]
        public double UpperThreshold { get; set; }
        
        [Parameter("LowerThreshold", DefaultValue = 30, Group ="Indicator Data")]
        public double LowerThreshold { get; set; }

        [Parameter("Send a Telegram?", DefaultValue = false, Group ="Telegram Notifications")]
        public bool IncludeTelegram { get; set; }
        
        [Parameter("Bot Token", DefaultValue = "", Group ="Telegram Notifications" )]
        public string BotToken { get; set; }
        
        [Parameter("Chat ID", DefaultValue = "", Group ="Telegram Notifications")]
        public string ChatID { get; set; }
       
        [Output("Main", PlotType = PlotType.Histogram, LineColor = "Green", Thickness = 2)]
        public IndicatorDataSeries Result { get; set; }
 
        #endregion
        
        
        public RelativeStrengthIndex Rsi  { get; set;}
        
        protected override void Initialize()
        {
            Rsi = Indicators.RelativeStrengthIndex (Source, Period);   
        }

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

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I would humbly appreciate your help and much thank you in advance.