A cod with API guide

Hello guys, I built a code based on the platform's API guide. however I found a problem that I don't know how to solve Could someone tell me how to solve this problem ?? Thank you very much for your attention 

PS Mr Panagiotis  Thank you for your very helpful service, as soon as my bot is finished I will send you a bottle of champagne ;)

using System;
using System.Linq;
using cAlgo.API;
using cAlgo.API.Indicators;
using cAlgo.API.Internals;
using cAlgo.Indicators;

namespace cAlgo.Robots
{
    [Robot(TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class agoravai : Robot
    {
    
       
     
    



}
        protected override void OnStart()
        {
        {
            _rsi = Indicators.RelativeStrengthIndex(Bars.ClosePrices, 3);
            _rsi2 = Indicators.RelativeStrengthIndex(Bars.ClosePrices, 6);
            _rsi3 = Indicators.RelativeStrengthIndex(Bars.ClosePrices, 12);
        }


}



        protected override void OnTick()
        {
            if (_rsi.Result.LastValue <80 )
                if (_rsi2.Result.LastValue < 80)
                    if (_rsi3.Result.LastValue < 80)
                        
   
            var result = ExecuteMarketOrder(TradeType.Sell, Symbol, 1);

            if (result.IsSuccessful)
            {
                var position = result.Position;
                Print("Position entry price is {0}", position.EntryPrice);  if (result.IsSuccessful)
        
            }
        }
    
       

         {
            var position = Positions.Find("myLabel");
            if (position != null && position.GrossProfit > 75)
            {
                ClosePosition(Sell);
                Stop();
            }
        }
    

            if (_rsi.Result.LastValue > 20)
                if (_rsi2.Result.LastValue > 20)
                    if (_rsi3.Result.LastValue > 20)   
        {
            var result = ExecuteMarketOrder(TradeType.Buy, Symbol, 1);
          

            if (result.IsSuccessful)
            {
                var position = result.Position;
                Print("Position entry price is {0}", position.EntryPrice);
            }
        }
    
       

         {
            var position = Positions.Find("myLabel");
            if (position != null && position.GrossProfit > 75)
            {
                ClosePosition(Buy);
                Stop();
            }}}