help my bot stop working

sorry I am new in writing C#

after open an instance of GBPUSD 1 Minute and run for a while (1-2 hour) bot stop working. I want to run this 7-24

How could I fix this ?

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

namespace cAlgo
{
    [Robot(TimeZone = TimeZones.UTC, AccessRights = AccessRights.FileSystem)]


    public class algoFollowSignal : Robot
    {

        [Parameter("trade name", DefaultValue = "algo1")]
        public string tradeName { get; set; }

        [Parameter(DefaultValue = 200000)]
        public double limitLotSize { get; set; }


        // ------------------------ PRE-DEFINE -----------------------------


        public double tradeSignal;
        private string[][] param = new string[5][];


        // ------------------------ STRUCTURE -----------------------------

        protected override void OnStart()
        {
            tradeSignal = 0;
        }

        protected override void OnTick()
        {
            getSignal();
            int currentPosi = getTradeTypePosi();
            double vol1 = (Math.Floor((Account.Balance * 1.0) * (10000 / 200) / 1000)) * 1000;
            if (vol1 > limitLotSize)
                vol1 = limitLotSize;
            vol1 = 10000;

            if (tradeSignal == 0)
            {
                if (!NoOrders())
                {
                    closeOrder();
                }
            }
            if (tradeSignal == 1)
            {
                currentPosi = getTradeTypePosi();
                if (currentPosi == -1)
                    closeOrder();
                if (currentPosi == 0)
                    ExecuteMarketOrder(TradeType.Buy, Symbol.Name, vol1, tradeName);
            }
            if (tradeSignal == -1)
            {

                if (currentPosi == 1)
                    closeOrder();
                if (currentPosi == 0)
                    ExecuteMarketOrder(TradeType.Sell, Symbol.Name, vol1, tradeName);
            }

        }

        protected override void OnBar()
        {

        }


        protected void closeOrder()
        {

            foreach (var pos in Positions)
            {
                if (pos.Label == tradeName)
                    ClosePosition(pos);
            }
        }
        protected override void OnStop()
        {

        }


        // ------------------------ FUNCTION -----------------------------


        protected void getSignal()
        {
            using (var reader = new StreamReader("d:\\ctdnParameters/signal.csv"))
            {
                int i = 0;
                while (!reader.EndOfStream)
                {
                    var line = reader.ReadLine();
                    var values = line.Split(',');
                    param[i] = values;
                    i++;
                }
            }
            tradeSignal = double.Parse(param[0][0]);
        }

        int getTradeTypePosi()
        {

            foreach (Position pos in Positions)
            {
                if (pos.Label == tradeName && pos.TradeType == TradeType.Buy)
                    return 1;
                if (pos.Label == tradeName && pos.TradeType == TradeType.Sell)
                    return -1;
            }

            return 0;
        }


        bool NoOrders()
        {
            foreach (Position pos in Positions)
            {
                if (pos.Label == tradeName)
                    return false;
            }

            foreach (PendingOrder po in PendingOrders)
            {
                if (po.Label == tradeName)
                    return false;
            }

            return true;
        }


        //end
    }
}