please help solve this

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#property show_inputs
#include <CUSTOMFILES.mqh>

int magicNB = 55555;
input int bbPeriod = 50;

input int bandStdEntry = 2;
input int bandStdProfitExit = 1;
input int bandStdLossExit = 6;
int rsiPeriod = 14;
input double riskPerTrade = 0.02;
input int rsiLowerLevel = 40;
input int rsiUpperLevel = 60;

int openOrderID;

//+------------------------------------------------------------------+
//| Expert initialization function                                   |
//+------------------------------------------------------------------+
int OnInit()
  {
//---
     Alert("");
   Alert("NKANYEZI");

   return(INIT_SUCCEEDED);
   
  }
//+------------------------------------------------------------------+
//| Expert deinitialization function                                 |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
  {
//---
     Alert("NKANYEZI");
   
  }
//+------------------------------------------------------------------+
//| Expert tick function                                             |
//+------------------------------------------------------------------+
void OnTick()
  {
//---
    
   double bbLowerEntry = iBands(NULL,0,bbPeriod,bandStdEntry,0,PRICE_CLOSE,MODE_LOWER,0);
   double bbUpperEntry = iBands(NULL,0,bbPeriod,bandStdEntry,0,PRICE_CLOSE,MODE_UPPER,0);
   double bbMid = iBands(NULL,0,bbPeriod,bandStdEntry,0,PRICE_CLOSE,0,0);
   
   double bbLowerProfitExit = iBands(NULL,0,bbPeriod,bandStdProfitExit,0,PRICE_CLOSE,MODE_LOWER,0);
   double bbUpperProfitExit = iBands(NULL,0,bbPeriod,bandStdProfitExit,0,PRICE_CLOSE,MODE_UPPER,0);
   
   double bbLowerLossExit = iBands(NULL,0,bbPeriod,bandStdLossExit,0,PRICE_CLOSE,MODE_LOWER,0);
   double bbUpperLossExit = iBands(NULL,0,bbPeriod,bandStdLossExit,0,PRICE_CLOSE,MODE_UPPER,0);
   
   double rsiValue = iRSI(NULL,0,rsiPeriod,PRICE_CLOSE,0);
   
   if(!CheckIfOpenOrdersByMagicNB(magicNB))//if no open orders try to enter new position
   {
      if(Ask < bbLowerEntry && Open[0] > bbLowerEntry && rsiValue < rsiLowerLevel)//buying
      {
         Print("Price is bellow bbLower and rsiValue is lower than " + rsiLowerLevel+ " , Sending buy order");
         double stopLossPrice = NormalizeDouble(bbLowerLossExit,Digits);
         double takeProfitPrice = NormalizeDouble(bbUpperProfitExit,Digits);;
         Print("Entry Price = " + Ask);
         Print("Stop Loss Price = " + stopLossPrice);
         Print("Take Profit Price = " + takeProfitPrice);
         
         double lotSize = OptimalLotSize(riskPerTrade,Ask,stopLossPrice);
         
         openOrderID = OrderSend(NULL,OP_BUYLIMIT,lotSize,Ask,10,stopLossPrice,takeProfitPrice,NULL,magicNB);
         if(openOrderID < 0) Alert("order rejected. Order error: " + GetLastError());
      }
      else if(Bid > bbUpperEntry && Open[0] < bbUpperEntry && rsiValue > rsiUpperLevel)//shorting
      {
         Print("Price is above bbUpper and rsiValue is above " + rsiUpperLevel + " Sending short order");
         double stopLossPrice = NormalizeDouble(bbUpperLossExit,Digits);
         double takeProfitPrice = NormalizeDouble(bbLowerProfitExit,Digits);
         Print("Entry Price = " + Bid);
         Print("Stop Loss Price = " + stopLossPrice);
         Print("Take Profit Price = " + takeProfitPrice);
          
          double lotSize = OptimalLotSize(riskPerTrade,Bid,stopLossPrice);

          openOrderID = OrderSend(NULL,OP_SELLLIMIT,lotSize,Bid,10,stopLossPrice,takeProfitPrice,NULL,magicNB);
          if(openOrderID < 0) Alert("order rejected. Order error: " + GetLastError());
      }
   }
   else //else if you already have a position, update orders if need too.
   {
      if(OrderSelect(openOrderID,SELECT_BY_TICKET)==true)
      {
            int orderType = OrderType();// Short = 1, Long = 0

            double optimalTakeProfit;
            
            if(orderType == 0)//long position
            {
               optimalTakeProfit = NormalizeDouble(bbUpperProfitExit,Digits);
               
            }
            else //if short
            {
               optimalTakeProfit = NormalizeDouble(bbLowerProfitExit,Digits);
            }

            double TP = OrderTakeProfit();
            double TPdistance = MathAbs(TP - optimalTakeProfit);
            if(TP != optimalTakeProfit && TPdistance > 0.0001)
            {
               bool Ans = OrderModify(openOrderID,OrderOpenPrice(),OrderStopLoss(),optimalTakeProfit,0);
            
               if (Ans==true)                     
               {
                  Print("Order modified: ",openOrderID);
                  return;                           
               }else
               {
                  Print("Unable to modify order: ",openOrderID);
               }   
            }
         }
      }
   
  }
//+------------------------------------------------------------------+

 please help me fix the annoying error 130 on this code.

 
I know that it is not obvious, but topics concerning MT4 and MQL4 have their own section.
In future please post in the correct section.
I will move your topic to the MQL4 and Metatrader 4 section.
 
thank you and my apologies
  
  1.           openOrderID = OrderSend(NULL,OP_SELLLIMIT,lotSize,Bid,10,stopLossPrice,takeProfitPrice,NULL,magicNB);

    Be careful with NULL.

    1. On MT4, you can use NULL in place of _Symbol only in those calls that the documentation specially says you can. iHigh does, iCustom does, MarketInfo does not, OrderSend does not.
    2. Don't use NULL (except for pointers where you explicitly check for it.) Use _Symbol and _Period, that is minimalist as possible and more efficient.
    3. Zero is the same as PERIOD_CURRENT which means _Period. Don't hard code numbers.
    4. MT4: No need for a function call with iHigh(NULL,0,s) just use the predefined arrays, i.e. High[].
    5. Cloud Protector Bug? - MQL4 programming forum 2020.07.25

  2. How To Ask Questions The Smart Way. 2004
              Use meaningful, specific subject headers.

 
I am very new to this how exactly do I fix it? Please
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