MQL4 Programming

Quoting ramzam

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because i want to do one indicator many are not said it is repaint but i want to do that without repaint... so i must learn coding... then only i can do that..

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//+------------------------------------------------------------------+
//|                                                  Learning stuff! |
//|                        Copyright 2017, MetaQuotes Software Corp. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2017, MetaQuotes Software Corp."
#property link      "https://www.mql5.com"
#property version   "1.00"
#property strict
#property indicator_chart_window
string name="NaosBlue";
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
   Print("Here we go, ",name);
  
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
//Indicators
   double RSIoutput=iRSI(NULL,0,14,PRICE_CLOSE,0);
   double CCIoutput=iCCI(NULL,0,14,PRICE_CLOSE,0);
   double Dmkoutput=iDeMarker(NULL,0,14,0);
  
//Ordering
   {
    //Buy order
    
   if ((RSIoutput<30)&&(CCIoutput<-200)&&(Dmkoutput<.25));
      {
      Print("BUY!");
      }
  
    //Sell order
  
   if ((RSIoutput>70)&&(CCIoutput>200)&&(Dmkoutput>.75));
      {
      Print("SELL!");
      }
  }
  
//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+

Quoting yousername

Disliked

{quote} Learn by doing. Don't make my videos and effort become fruitless.

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Quoting Naosblue

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Maybe I can get some help on this. I am trying to create an indicator (which I will turn into an EA) that will buy and sell when indicators are in agreement. However, every tick it says both buy and sell. Any ideas? //+------------------------------------------------------------------+ //| Learning stuff! | //| Copyright 2017, MetaQuotes Software Corp. | //| https://www.mql5.com | //+------------------------------------------------------------------+ #property copyright "Copyright 2017, MetaQuotes Software Corp." #property link "https://www.mql5.com"...

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Quoting Naosblue

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Maybe I can get some help on this. I am trying to create an indicator (which I will turn into an EA) that will buy and sell when indicators are in agreement. However, every tick it says both buy and sell. Any ideas? //+------------------------------------------------------------------+ //| Learning stuff! | //| Copyright 2017, MetaQuotes Software Corp. | //| https://www.mql5.com | //+------------------------------------------------------------------+ #property copyright "Copyright 2017, MetaQuotes Software Corp." #property link "https://www.mql5.com"...

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//+------------------------------------------------------------------+
//|                                                  Learning stuff! |
//|                        Copyright 2017, MetaQuotes Software Corp. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2017, MetaQuotes Software Corp."
#property link      "https://www.mql5.com"
#property version   "1.00"
#property strict
#property indicator_chart_window
string name="NaosBlue";
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
   Print("Here we go, ",name);
  
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
//Indicators
   double RSIoutput=iRSI(NULL,0,14,PRICE_CLOSE,0);
   double CCIoutput=iCCI(NULL,0,14,PRICE_CLOSE,0);
   double Dmkoutput=iDeMarker(NULL,0,14,0);
  
//Ordering
    //Buy order
    
   if ((RSIoutput<30)&&(CCIoutput<-200)&&(Dmkoutput<.25))
   {
      Print("BUY!");
   }
  
    //Sell order
  
   else if ((RSIoutput>70)&&(CCIoutput>200)&&(Dmkoutput>.75))
   {
      Print("SELL!");
   }
   else{
      Print("BUY/SELL CONDITION NOT YET MET, DO NOTHING");
   }
  
//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+

Quoting yousername

Disliked

{quote} //+------------------------------------------------------------------+ //| Learning stuff! | //| Copyright 2017, MetaQuotes Software Corp. | //| https://www.mql5.com | //+------------------------------------------------------------------+ #property copyright "Copyright 2017, MetaQuotes Software Corp." #property link "https://www.mql5.com" #property version "1.00" #property strict #property indicator_chart_window string name="NaosBlue"; //+------------------------------------------------------------------+ //| Custom indicator initialization...

Ignored

if(bla_bla_bla<30){
do something here
}

if(bla_bla_bla<30);
{
do something here
}

Quoting Naosblue

Disliked

That did it, thanks! Now I just have to have it stop ticking when it does meet the qualifications, but I need some sleep.

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Quoting yousername

Disliked

{quote} I have to emphasize here that it is important to read through the documentation/API provided by MetaQuote or any programming language https://docs.mql4.com/basis/preprosessor/compilation << there you will find info about property https://docs.mql4.com/basis/function/events and https://docs.mql4.com/runtime/event_fire#start <<Event handling, there you will find start

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Quoting yousername

Disliked

{quote} Look at the screenshot. {image} Your code doesn't work because the controlled statement is empty, that's why it prints BUY and SELL You should do instead is like below correct if(bla_bla_bla<30){ do something here } Don't do if(bla_bla_bla<30); { do something here } Notice the different, the wrong one has semi-colon or ; on each statement. When you remove it, you won't see the warning as seen in the screenshot above.

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//+------------------------------------------------------------------+
//|                                                  tutorial 4A.mq4 |
//|                        Copyright 2017, MetaQuotes Software Corp. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2017, MetaQuotes Software Corp."
#property link      "https://www.mql5.com"
#property version   "1.00"
#property strict
#property indicator_chart_window
#property indicator_buffers 4
#property indicator_color1  clrNONE
#property indicator_width1  2
double TEST[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
      SetIndexLabel(0,"BUFFER 0");
      SetIndexLabel(1,"TEST");
      SetIndexLabel(2,"BUFFER 1");
      SetIndexLabel(3,"BUFFER 2"); 
      
      SetIndexStyle(0,DRAW_LINE, 0,0,clrRed);
      SetIndexStyle(1,DRAW_LINE, 0,0,clrGreen);
      SetIndexStyle(2,DRAW_LINE, 0,0,clrBlue);
      
      SetIndexBuffer(2,TEST);
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
//---
   
   for(int i=0;i<Bars-1;i++){
      TEST[i]=iMA(Symbol(),PERIOD_CURRENT,20,0,MODE_SMA,PRICE_CLOSE,i);
   }
//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+

Quoting ramzam

Disliked

why do we put #property strict this line... what is the purpose to put strict... what will happen if we put strict..... if not strict means what will happen

Ignored

//+------------------------------------------------------------------+
//|                                                         test.mq4 |
//|                        Copyright 2016, MetaQuotes Software Corp. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2016, MetaQuotes Software Corp."
#property link      "https://www.mql5.com"
#property version   "1.00"
#property strict
//Global variables
int myInteger=25;
double myDouble=1.123456;
string myString="My age is 99 years old";
//+------------------------------------------------------------------+
//| Script program start function                                    |
//+------------------------------------------------------------------+
void OnStart()
{
   int localInteger;
   Print(arithmetic(100,-500,5,5,500));
}
void test(){
   myInteger=1;
   int localInteger=100;
   Print(localInteger);
}
int test1(){
   return 1;
}
double test2(){
   return 1.12345;
}
string test3(){
   test();
   return "Yohooo";
}
int arithmetic(int i, int j, int x, int y, int z){
   int result = i+j*(x/y)-z;
   return result;
}

Quoting kullback

Disliked

Hi yousername, thanks for starting the post. I have a question regarding the security aspect of code. How secure is ex4 code against decompiling when compiled on version 4.00 build 1065? And if it is easy to decompile, do you know what alternatives exist to secure mql4 source code (as best as possible)? Thanks!

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//+------------------------------------------------------------------+
//|                                                  Ultimate EA.mq4 |
//|                        Copyright 2017, MetaQuotes Software Corp. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Zexchange"
#property link      "don't have one yet"
#property version   "1.00"
#property strict
extern int     MagicNumber  =2222;
extern double  Lots         =0.1;
extern double  StopLoss     =10;
extern double  TakeProfit   =10;
extern int     TrailingStop =50;
extern int     Slippage     =3;
//RSI Values
extern int RSIperiod    =14;
extern int RSIbuy       =30;
extern int RSIsell      =70;
extern int RSIbuyclose  =70;
extern int RSIsellclose =30;
//CCI Values
extern int CCIperiod    =14;
extern int CCIbuy       =-250;
extern int CCIsell      =250;
extern int CCIbuyclose  =250;
extern int CCIsellclose=-250;
 
//+------------------------------------------------------------------+
//| Expert initialization function                                   |
//+------------------------------------------------------------------+
int OnInit()
  {
   Print("*****Here we go!*****");
   
//---
   
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Expert deinitialization function                                 |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
  {
//---
   
  }
//+------------------------------------------------------------------+
//| Expert tick function                                             |
//+------------------------------------------------------------------+
void OnTick()
{
 double RSI = iRSI(NULL,0,RSIperiod,0,0);  //RSI Value
 double CCI = iCCI(NULL,0,CCIperiod,0,0);  //CCI Value
 double TP   =0;
 double SL   =0;
 int TotalOrdersCount=0;
 bool runawaybuy=0;                        //Stop concurrent buy losses
 bool runawaysell=0;                       //Stop concurrent sell losses
//+------------------------------------------------------------------+
//| Do while Loop                                                    |
//+------------------------------------------------------------------+
  if( TotalOrdersCount()==0 )
  {
   int ticket=0;
//+------------------------------------------------------------------+
//| Buy Order                                                        |
//+------------------------------------------------------------------+
   if ((RSI<RSIbuy)&&(CCI<CCIbuy)&&(runawaybuy=true))                //buy calculation and runaway check
      {
       ticket=OrderSend(Symbol(),OP_BUY,Lots,Ask,Slippage,0,0,"Buy order",MagicNumber,0,clrGreen);
       Print("Order number is ",ticket);
       if(ticket>0)
        {
         if(TakeProfit>0)  TP=Ask+TakeProfit;
         if(StopLoss>0)    SL=Ask-StopLoss;
         OrderSelect(ticket,SELECT_BY_TICKET);
         OrderModify(OrderTicket(),OrderOpenPrice(),NormalizeDouble(SL,Digits),NormalizeDouble(TP,Digits),0,Green);
         runawaysell=0;  //runaway reset
        }
         return;
      }
      
//+------------------------------------------------------------------+
//| Sell order                                                       |
//+------------------------------------------------------------------+
   if ((RSI>RSIsell)&&(CCI>CCIsell)&&(runawaysell=true))             //sell calculation and runaway check
      {
       ticket=OrderSend(Symbol(),OP_SELL,Lots,Bid,Slippage,0,0,"Sell order",MagicNumber,0,clrRed);
       Print("Order number is ",ticket);
       if(ticket>0)
        {
         if(TakeProfit>0)  TP=Bid+TakeProfit;
         if(StopLoss>0)    SL=Bid-StopLoss;
         OrderSelect(ticket, SELECT_BY_TICKET);
         OrderModify(OrderTicket(),OrderOpenPrice(),NormalizeDouble(SL,Digits),NormalizeDouble(TP,Digits),0,clrGreen);
         runawaybuy=0;  //runaway reset
       }
       return;
      }
   
//+------------------------------------------------------------------+
//| Order Close Loop                                                 |
//+------------------------------------------------------------------+
 
 for(int cnt=0;cnt<OrdersTotal();cnt++)
    {
     OrderSelect(cnt, SELECT_BY_POS, MODE_TRADES);
     if(OrderType()<=OP_SELL &&   
        OrderSymbol()==Symbol() &&
        OrderMagicNumber()==MagicNumber)
         {
         if(OrderType()==OP_BUY)
          {
         
//+------------------------------------------------------------------+
//| Buy Close                                                        |
//+------------------------------------------------------------------+
   
         if ((RSI>RSIbuyclose)&&(CCI>CCIbuyclose))
          {
           Print("Buy close");
           OrderClose(OrderTicket(),Lots,Bid,Slippage,clrGreen);
           if(OrderClosePrice()>OrderOpenPrice())   //losing trade check
            {
             runawaybuy=1;  //running away
            }
           return;
          }
   
//+------------------------------------------------------------------+
//| Sell Close                                                       |
//+------------------------------------------------------------------+
      else
         {
          if((RSI<RSIsellclose)&&(CCI<CCIsellclose))
           {
            Print("Sell close");
            OrderClose(OrderTicket(),Lots,Bid,Slippage,clrRed);
            if(OrderClosePrice()<OrderOpenPrice())  //losing trade check
             {
              runawaysell=1;  //running away
             }
              return;
            }
          }
        }
      }
    }
  }
 
//+------------------------------------------------------------------+
//| End Loop                                                         |
//+------------------------------------------------------------------+
}
int TotalOrdersCount()
{
  int ticket=0;
  for(int i=0;i<OrdersTotal();i++)
  {
 
     OrderSelect(i,SELECT_BY_POS ,MODE_TRADES);
     if (OrderMagicNumber()==MagicNumber) ticket++;
   }
  return (ticket);
}
 

//+------------------------------------------------------------------+
//| Errors                                                           |
//+------------------------------------------------------------------+
/*
int Fun_Error(int Error)                        // Function of processing errors
  {
   switch(Error)
     {                                          // Not crucial errors            
      case  4: Alert("Trade server is busy. Trying once again..");
         Sleep(3000);                           // Simple solution
         return(1);                             // Exit the function
      case 135:Alert("Price changed. Trying once again..");
         RefreshRates();                        // Refresh rates
         return(1);                             // Exit the function
      case 136:Alert("No prices. Waiting for a new tick..");
         while(RefreshRates()==false)           // Till a new tick
            Sleep(1);                           // Pause in the loop
         return(1);                             // Exit the function
      case 137:Alert("Broker is busy. Trying once again..");
         Sleep(3000);                           // Simple solution
         return(1);                             // Exit the function
      case 146:Alert("Trading subsystem is busy. Trying once again..");
         Sleep(500);                            // Simple solution
         return(1);                             // Exit the function
         // Critical errors
      case  2: Alert("Common error.");
         return(0);                             // Exit the function
/*
     
      case  5: Alert("Old terminal version.");
         Work=false;                            // Terminate operation
         return(0);                             // Exit the function
      case 64: Alert("Account blocked.");
         Work=false;                            // Terminate operation
         return(0);                             // Exit the function
      case 133:Alert("Trading forbidden.");
         return(0);                             // Exit the function
      case 134:Alert("Not enough money to execute operation.");
         return(0);                             // Exit the function
      default: Alert("Error occurred: ",Error);  // Other variants   
         return(0);                             // Exit the function
     }
  }
  }
//+------------------------------------------------------------------+
*/

Quoting yousername

Disliked

In this thread, I will teach you how to code or do some programming. I will use MQL4 for the programming language.. I will start make a video tomorrow and post it right here. I will try make it easy for you guys.

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