Help with Object reference not set to an instance of an object - Error

Hi Everyone,

I am still new in terms of C-algo experience. But I am making surprising progress in a couple of weeks.  I nearly have my systems fully working and even as is it does seem to way outperform MT4. However, I have one bug I cannot solve.

I need to copy in some stop order from MT4. So I have edited the MT4 to C-trader copier by siamfx, such that it copies over stop orders. It seemed to working without crashing for a few days

// ---------------------------------------------------------------------------------------
//
//    CSV reader to tansfer only stop orders from CSV  
//    mt4 writes to file 
//    version1 
//    lotsize calculation fixed _july1_siamfx
//
// ---------------------------------------------------------------------------------------
using System;
using System.Collections.Generic;
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.FullAccess)]
    //AccessRights.FullAccess

    public class MT2cTrader : Robot
    {



        [Parameter("Close Hour", DefaultValue = 18, MinValue = 0, MaxValue = 23)]
        public int CloseHour { get; set; }

        [Parameter("Close Minute", DefaultValue = 30, MinValue = 0, MaxValue = 59)]
        public int CloseMinute { get; set; }

        [Parameter("Orders Input File Path", DefaultValue = "C:\\PFDMT4\\MQL4\\Files\\TradeCopy.csv")]
        //MT4 -1 
        //C:\\Users\\trader\\AppData\\Roaming\\MetaQuotes\\Terminal\\69420FB8433504FEA0FA029C390238DB\\MQL4\\Files\\TradeCopy.csv


        public string orders_input_file { get; set; }

        [Parameter("Slippage", DefaultValue = 3.5)]
        public double slippage { get; set; }


        [Parameter("Delimiter", DefaultValue = ";")]
        public string delimiter { get; set; }

        protected override void OnStart()
        {
            Timer.Start(3);
            //start timer with 3 second interval
            Print(Server.Time.DayOfWeek, Server.Time.Hour, Server.Time.Minute);





            //  var triggerTimeInLocalTimeZone = new DateTime(DateTime.Now.Year, DateTime.Now.Month, CloseDay, CloseHour, CloseMinute, 0);
            // _triggerTimeInServerTimeZone = TimeZoneInfo.ConvertTime(triggerTimeInLocalTimeZone, TimeZoneInfo.Local, TimeZone);


        }

        private bool debug = true;

        protected override void OnTimer()
        {
            //todo, check M.D.
            //price = marketDepth.AskEntries[0].Price; 
            //volume = marketDepth.AskEntries[0].Volume;


            //
            if ((Server.Time.DayOfWeek == DayOfWeek.Friday) && (Server.Time.Hour == CloseHour) && (Server.Time.Minute >= CloseMinute))
            {


                foreach (var order in PendingOrders)
                {
                    CancelPendingOrder(order);
                }

                var positions = Positions.FindAll(null);

                foreach (var position in positions)
                {
                    ClosePosition(position);
                }

                Print("End of Week Shutdown");

                // then stop the robot
                int milliseconds = 18000000;
                System.Threading.Thread.Sleep(milliseconds);

                // Stop();


            }


            string[] lines = new String[0];

            try
            {
                lines = File.ReadAllLines(orders_input_file);

            } catch (Exception e)
            {
                // return -july 4th
                Print("Exception Error on MT2cTrader: " + e.Message);
                return;
            }

            List<string> existing_positions = new List<string>();

            foreach (string line in lines)
            {

                OrderData order = new OrderData(line.Split(delimiter.Length > 0 ? delimiter[0] : ','), MarketData);
                existing_positions.Add(order.label);

                if (debug)
                    Print(line);
                var allowtrade = 1;

                double lotratio = (Account.Balance / order.senderbalance);
                double hmm = Convert.ToDouble(order.lot);
                hmm = (hmm * lotratio);
                // order.lot = Symbol.QuantityToVolume(hmm);
                order.lot = Symbol.NormalizeVolume(hmm, RoundingMode.Down);

                Print("Order Voume is  {0}", order.lot);
                Print("Lot Ration is  {0}", lotratio);
                Print("Lots before conversion are  {0}", hmm);


                foreach (var exorder in PendingOrders)
                {
                    if (exorder.Comment == order.comment)
                    {
                        allowtrade = 0;

                    }
                }


                foreach (HistoricalTrade trade in History)
                {
                    if (trade.Comment == order.comment)
                    {
                        allowtrade = 0;

                    }
                }

                if (order.isCorrect() && (allowtrade == 1) && (Positions.Find(order.comment) == null) && order.label != "331815188" && (Server.Time.DayOfWeek == DayOfWeek.Monday) || (Server.Time.DayOfWeek == DayOfWeek.Tuesday) || (Server.Time.DayOfWeek == DayOfWeek.Wednesday) || (Server.Time.DayOfWeek == DayOfWeek.Thursday) || (Server.Time.DayOfWeek == DayOfWeek.Friday))


                    PlaceStopOrder(order.type, order.symbol, order.lot, order.price, order.label, order.sl, order.tp, null, order.comment);
            }
//=== error


        }

    }

    public class OrderData
    {

        private const long mt_lot_coefficient = 100000;
        //corrected_100000_july1
        public Symbol symbol;
        public TradeType type;
        public long lot;
        public double price;
        public int sl;
        public int tp;
        public string label;
        public string comment;
        public double senderbalance;
        private bool initialized_properly = true;

        public OrderData(string[] raw_pieces, MarketData market_data)
        {
            try
            {
                this.comment = raw_pieces[0].Trim();
                this.symbol = market_data.GetSymbol(raw_pieces[1].Trim());
                this.setType(Convert.ToInt32(raw_pieces[2].Trim()));
                this.lot = Convert.ToInt64(this.parseDouble(raw_pieces[3]) * mt_lot_coefficient);
                this.price = this.parseDouble(raw_pieces[4]);
                this.sl = this.getPipDistance(price, this.parseDouble(raw_pieces[5]));
                this.tp = this.getPipDistance(price, this.parseDouble(raw_pieces[6]));
                this.label = raw_pieces[7].Trim();
                this.senderbalance = this.parseDouble(raw_pieces[8]);
            } catch (Exception e)
            {
                this.initialized_properly = false;
            }
        }

        public bool isCorrect()
        {
            return this.initialized_properly;
        }

        private double parseDouble(string value)
        {
            return double.Parse(value.Trim().Replace(',', '.'), System.Globalization.CultureInfo.InvariantCulture);
        }





        private void setType(int mt_type)
        {
            this.type = mt_type == 4 ? TradeType.Buy : TradeType.Sell;
        }

        private int getPipDistance(double basic_price, double close_price)
        {
            return Convert.ToInt32(Math.Round(Math.Abs(basic_price - close_price) / this.symbol.PipSize));
        }

    }

}

 and now it crashes over and over with the error.

“Crashed in OnTime with NullReferenceException: Object reference not set to an instance of an object”

Can anyone tell what I have done wrong. I only have 1 week of c programming.

If you see the issue can you please let me know in simple terms how to solve it.

Thanks so so much

Cheers Sim