MQL4 Guide

RickD · #1 (**permalink**) 05-27-2007, 06:59 PM

Hi,
I'm going to place here the various helpful MQL4 code.

RickD · #2 (**permalink**) 05-27-2007, 07:00 PM

OrdersCount function allows to get the orders count of predefined type.

Code:

int OrdersCount(int type)
{
  int orders = 0;
 
  int cnt = OrdersTotal();
  for (int i=0; i<cnt; i++) {
    if (!OrderSelect(i, SELECT_BY_POS, MODE_TRADES)) continue;
 
    //if (OrderSymbol() != Symbol()) continue;
    //if (OrderMagicNumber() != Magic) continue;
 
    if (OrderType() == type) orders++;
  }
 
  return (orders);
}

Example:

Code:

int start() 
{
  int BuyCnt = OrdersCount(OP_BUY);
  if (BuyCnt > 0) return (0);
  ...

RickD · #3 (**permalink**) 05-27-2007, 07:01 PM

How to close the all market orders:

Code:

int Slippage = 3;
 
void CloseOrders() 
{
  int cnt = OrdersTotal();
  for (int i=cnt-1; i>=0; i--) {
    if (!OrderSelect(i, SELECT_BY_POS, MODE_TRADES)) continue;
 
    //if (OrderSymbol() != Symbol()) continue;
    //if (OrderMagicNumber() != Magic) continue;
 
    if (OrderType() == OP_BUY) OrderClose(OrderTicket(), OrderLots(), MarketInfo(OrderSymbol(), MODE_BID), Slippage);
    if (OrderType() == OP_SELL) OrderClose(OrderTicket(), OrderLots(), MarketInfo(OrderSymbol(), MODE_ASK), Slippage);
  }
}

How to close all the orders of predefined type:

Code:

void CloseOrders(int type) 
{
  int cnt = OrdersTotal();
  for (int i=cnt-1; i>=0; i--) {
    if (!OrderSelect(i, SELECT_BY_POS, MODE_TRADES)) continue;
 
    //if (OrderSymbol() != Symbol()) continue;
    //if (OrderMagicNumber() != Magic) continue;
    
    if (OrderType() != type) continue;
    
    if (OrderType() == OP_BUY) OrderClose(OrderTicket(), OrderLots(), MarketInfo(OrderSymbol(), MODE_BID), Slippage);
    if (OrderType() == OP_SELL) OrderClose(OrderTicket(), OrderLots(), MarketInfo(OrderSymbol(), MODE_ASK), Slippage);
  }
}

RickD · #4 (**permalink**) 05-27-2007, 07:02 PM

GetLastOpenTime function gets OpenTime of the last order with predefined type.
The function makes a search of open trades and the history.
-1 means there are no orders found.

Code:

datetime GetLastOpenTime(int type) 
{
 
  datetime tm = -1;
 
  int cnt = OrdersTotal();
  for (int i=0; i<cnt; i++) 
  {
    if (!OrderSelect(i, SELECT_BY_POS, MODE_TRADES)) continue;
    
    //Optional
    //if (OrderSymbol() != Symbol()) continue;
    //if (OrderMagicNumber() != Magic) continue;
    
    if (OrderType() != type) continue;
    
    tm = MathMax(tm, OrderOpenTime());
  }
 
  cnt = OrdersHistoryTotal();
  for (i=0; i<cnt; i++) 
  {
    if (!OrderSelect(i, SELECT_BY_POS, MODE_HISTORY)) continue;
 
    //Optional
    //if (OrderSymbol() != Symbol()) continue;
    //if (OrderMagicNumber() != Magic) continue;
    
    if (OrderType() != type) continue;
    
    tm = MathMax(tm, OrderOpenTime());
  }
 
  return (tm);
}

RickD · #5 (**permalink**) 05-27-2007, 07:20 PM

Quote:

Originally Posted by trader101

This is a very informative thread..Please do not stop..Continue teaching us who are new to this programming...

How do i code this procedure???
1. I want to open 3 trades in 3 different chart only after checking that there is not trade open at the moment then ...
2. I want to check the PL and if it is greater then 0, it will close all open and pending orders.
3. Then I want to open the same 3 trades in the opposite directions.
Thanks

ok.

1. I want to open 3 trades in 3 different chart only after checking that there is not trade open at the moment then ...

3. Then I want to open the same 3 trades in the opposite directions.

Code:

  int Magic = ...

  int BuyCnt = 0;
  int SellCnt = 0;
  
  int cnt = OrdersTotal();
  for (int i=0; i < cnt; i++) 
{
    if (!OrderSelect(i, SELECT_BY_POS, MODE_TRADES)) continue;
    if (OrderSymbol() != Symbol()) continue;
    if (OrderMagicNumber() != Magic) continue;
    
    int type = OrderType();
    if (type == OP_BUY) BuyCnt++;
    if (type == OP_SELL) SellCnt++;
  }
  
  if (BuyCnt > 0 || SellCnt > 0) return;

  //OrderSend(OP_BUY, ...
  //OrderSend(OP_SELL, ...

Run this code on 3 different charts you need.

2. I want to check the PL and if it is greater then 0, it will close all open and pending orders.

Code:

  if (AccountProfit() > 0) 
  {
    DeleteOrders();
    CloseOrders();
  }

void CloseOrders() 
{  
  int cnt = OrdersTotal();
  for (int i=cnt-1; i >= 0; i--) 
  {
    if (!OrderSelect(i, SELECT_BY_POS, MODE_TRADES)) continue;
    
    int type = OrderType();
    
    if (type == OP_BUY) 
    {
      RefreshRates();
      OrderClose(OrderTicket(), OrderLots(), MarketInfo(OrderSymbol(), MODE_BID), 3);
    }
          
    if (type == OP_SELL) 
    {
      RefreshRates();
      OrderClose(OrderTicket(), OrderLots(), MarketInfo(OrderSymbol(), MODE_ASK), 3);
    }
  }
  
}

void DeleteOrders() 
{
  int cnt = OrdersTotal();
  for (int i=cnt-1; i >= 0; i--) 
  {
    if (!OrderSelect(i, SELECT_BY_POS, MODE_TRADES)) continue;
        
    int type = OrderType();
    
    if (type == OP_BUYSTOP || type == OP_SELLSTOP || type == OP_BUYLIMIT || type == OP_SELLLIMIT) 
    {
      OrderDelete(OrderTicket());
    }
  }

}

RickD · #6 (**permalink**) 05-29-2007, 01:58 PM

NextDay function allows to get the date of next day.

Code:

void NextDay(int& day, int& month, int& year) 
{
  datetime Time0 = CurTime();
  datetime Tomorrow = Time0 + 24*60*60;
  
  day = TimeDayOfYear(Tomorrow);
  month = TimeMonth(Tomorrow);
  year = TimeYear(Tomorrow);
}

RickD · #7 (**permalink**) 06-05-2007, 01:05 AM

The following code allows to open a position at a preset time.

Code:

extern string OpenTime = "10:00-10:05; 12:20-12:31; 13:40-13:55";

void OpenPosition() 
{
  string OTA[];
  string OTI[];
  split(OTA, OpenTime, ";");
  
  datetime tm0 = CurTime();
  datetime tm1, tm2;
  
  bool cond = false;
  
  int cnt = ArraySize(OTA);
  for (int i=0; i < cnt; i++) {
    split(OTI, OTA[i], "-");
    if (ArraySize(OTI) != 2) continue;
    
    tm1 = StrToTime(TimeToStr(CurTime(), TIME_DATE) + " " + OTI[0]);
    tm2 = StrToTime(TimeToStr(CurTime(), TIME_DATE) + " " + OTI[1]);
   
    cond = cond || (tm1 <= tm0 && tm0 < tm2);
  }
  
        
  if (cond)
  {
    // Opening a position...
  }
}

void split(string& arr[], string str, string sym) 
{
  ArrayResize(arr, 0);
  string item;
  int pos, size;
  
  int len = StringLen(str);
  for (int i=0; i < len;) {
    pos = StringFind(str, sym, i);
    if (pos == -1) pos = len;
    
    item = StringSubstr(str, i, pos-i);
    item = StringTrimLeft(item);
    item = StringTrimRight(item);
    
    size = ArraySize(arr);
    ArrayResize(arr, size+1);
    arr[size] = item;
    
    i = pos+1;
  }
}

prasxz · #8 (**permalink**) 06-05-2007, 01:30 AM

is there any mql script that can show daily , weekly and monthly range for one currency ?

Thx

===================
Forex Indicators Collection

RickD · #9 (**permalink**) 06-05-2007, 01:42 AM

Quote:

Originally Posted by prasxz

is there any mql script that can show daily , weekly and monthly range for one currency ?

Thx

===================
Forex Indicators Collection

Good idea. I will add the required code ASAP.

RickD · #10 (**permalink**) 06-06-2007, 04:22 PM

Quote:

Originally Posted by prasxz

is there any mql script that can show daily , weekly and monthly range for one currency ?

Thx

===================
Forex Indicators Collection

Code:

double dRange = GetRange(D'01.01.2004 00:00', PERIOD_D1);
double wRange = GetRange(D'01.01.2004 00:00', PERIOD_W1);
double mRange = GetRange(D'01.01.2004 00:00', PERIOD_MN);

double GetRange(datetime tm, int period)
{
  int bar = iBarShift(NULL, period, tm);
  double range = iHigh(NULL, period, bar) - iLow(NULL, period, bar);
  return (range);
}