MQL4 Guide

#1
First Post: May 15, 2007 1:58pm May 15, 2007 1:58pm

RickD
| Joined Mar 2006 | Status: MQL developer | 47 Posts

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

Inserted 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:

Inserted Code

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

MQL4: idea * experience + creative solution

#2
May 15, 2007 1:59pm May 15, 2007 1:59pm

RickD
| Joined Mar 2006 | Status: MQL developer | 47 Posts

How to close all market orders:

Inserted 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:

Inserted 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);
  }
}

MQL4: idea * experience + creative solution

#3
May 15, 2007 2:00pm May 15, 2007 2:00pm

RickD
| Joined Mar 2006 | Status: MQL developer | 47 Posts

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

Inserted 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);
}

MQL4: idea * experience + creative solution

#4
May 20, 2007 9:45am May 20, 2007 9:45am

trader101
| Commercial User | Joined Dec 2006 | 2,911 Posts

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

#5
May 21, 2007 5:22am May 21, 2007 5:22am

RickD
| Joined Mar 2006 | Status: MQL developer | 47 Posts

Quoting trader101

Disliked

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

Ignored

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.

Inserted 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.

Inserted 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());
    }
  }

}

MQL4: idea * experience + creative solution

#6
May 22, 2007 6:58am May 22, 2007 6:58am

trader101
| Commercial User | Joined Dec 2006 | 2,911 Posts

My sincerest gratitude to you, sir...

#7
May 25, 2007 11:24am May 25, 2007 11:24am

RickD
| Joined Mar 2006 | Status: MQL developer | 47 Posts

Quoting trader101

Disliked

My sincerest gratitude to you, sir...

Ignored

MQL4: idea * experience + creative solution

#8
May 25, 2007 11:26am May 25, 2007 11:26am

RickD
| Joined Mar 2006 | Status: MQL developer | 47 Posts

The function allows to get the date of next day.

Inserted 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);
}

MQL4: idea * experience + creative solution

#9
May 27, 2007 12:17pm May 27, 2007 12:17pm

RickD
| Joined Mar 2006 | Status: MQL developer | 47 Posts

The following code allows to retrieve the ticket of the last closed order in account history

Inserted Code

int GetLastOrderHist(int type = -1) 
{
  int ticket = -1;
  datetime dt = 0;
  
  int cnt = OrdersHistoryTotal();
  for (int i=0; i < cnt; i++) 
  {
    if (!OrderSelect(i, SELECT_BY_POS, MODE_HISTORY)) continue;
    
    //if (OrderSymbol() != Symbol()) continue;
    //if (OrderMagicNumber() != Magic) continue;
    
    if (type != -1 && OrderType() != type) continue;
    
    if (OrderCloseTime() > dt) 
    {
      dt = OrderCloseTime();
      ticket = OrderTicket();
    }
  }
  
  return (ticket);
}

MQL4: idea * experience + creative solution

#10
May 27, 2007 12:56pm May 27, 2007 12:56pm

juxta14
| Joined Aug 2006 | Status: Trader | 41 Posts

Hi RickD,

Can you please write a code for closing all buys only or closing all sells at a profit dollar amount in a basket trade.

Thanks for you help.

.

#11
Edited 1:28pm May 27, 2007 1:04pm | Edited 1:28pm

RickD
| Joined Mar 2006 | Status: MQL developer | 47 Posts

Quoting juxta14

Disliked

Hi RickD,

Can you please write a code for closing all buys only or closing all sells at a profit dollar amount in a basket trade.

Thanks for you help.

.

Ignored

Inserted Code

  
extern double Profit = 1;
extern int Slippage = 3;

if (AccountProfit() > Profit) 
{
    CloseOrders(OP_BUY);
    //or CloseOrders(OP_SELL);
}

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 (type == OP_BUY) 
    {
      RefreshRates();
      OrderClose(OrderTicket(), OrderLots(), MarketInfo(OrderSymbol(), MODE_BID), Slippage);
      continue;
    }

    if (type == OP_SELL)
    {
       RefreshRates();
       OrderClose(OrderTicket(), OrderLots(), MarketInfo(OrderSymbol(), MODE_ASK), Slippage);
       continue;
    }

  }
}

MQL4: idea * experience + creative solution

#12
May 27, 2007 1:41pm May 27, 2007 1:41pm

juxta14
| Joined Aug 2006 | Status: Trader | 41 Posts

That was quick! I'll try it out when market opens.

Grateful.

.

#13
May 29, 2007 7:12am May 29, 2007 7:12am

RickD
| Joined Mar 2006 | Status: MQL developer | 47 Posts

Here is the function for dynamic calculation of working lot.

Inserted Code

extern bool uplot = true;
extern int lastprofit = 1;
extern double lotmin = 0.1;
extern double lotmax = 0.5;
extern double lotstep = 0.1;

double GetLots() 
{  
  double lot = lotmin;
  if (!uplot) return (lot);
  
  int ticket = GetLastOrderHist();
  if (ticket == -1) return (lot);
  
  if (!OrderSelect(ticket, SELECT_BY_TICKET, MODE_HISTORY)) return (lot);
  if (OrderProfit()*lastprofit < 0) return (lot);
  
  lot = MathMin(OrderLots() + lotstep, lotmax);
  return (lot);
}

int GetLastOrderHist(int type = -1)
{
  int ticket = -1;
  datetime dt = 0;
  int cnt = HistoryTotal();
    
  for (int i=0; i < cnt; i++) {
    if (!OrderSelect(i, SELECT_BY_POS, MODE_HISTORY)) continue;
 
    //if (OrderSymbol() != Symbol()) continue;
    //if (OrderMagicNumber() != Magic) continue;
    
    if (type != -1 && OrderType() != type) continue;
    
    if (OrderCloseTime() > dt) 
    {
      dt = OrderCloseTime();
      ticket = OrderTicket();
    }
  }
  
  return (ticket);
}

MQL4: idea * experience + creative solution

#14
Edited 5:52am May 30, 2007 3:52am | Edited 5:52am

Heino
| Commercial User | Joined May 2007 | 199 Posts

Hello,

Question: My indicator´s calculation´s loop is construct a little bit different from the standard exampels.

It look as this:

Inserted Code

if(loop == true){
limit=Bars;
loop=false;
} else {
   limit=0;
  }

//--start loop
for(int i=limit; i>=0;i--) {

For my calculations I need a solid indexvariable i and with this building you can see above i get it after the first tick comes into the terminal. But at first the indexvariable i is the amount of all Bars getting from the constant Bars. First if the first tick comes in and the start() function starts walking, than the indexvariable i for the loop ist changeing.

Now the problem is, when i shout down my terminal and restart again the indicator does not calculate the last bars that have been build for the time i have shout down it and as there is a gap.

There are other methods to calculate the loop indexvariable i like this:

Inserted Code

int    counted_bars=IndicatorCounted();
int limit, i;
if(counted_bars<0) return(-1);
limit=(Bars-counted_bars)-1;

for (i=limit; i>=0;i--)

but i don´t can use this method, because the indexvariable i is often changeing his value by this solution from 0 till 1 to often another value, but for my calculations i allways need a solid indexvariable i value after the first Tick.

#15
Jun 4, 2007 6:54pm Jun 4, 2007 6:54pm

RickD
| Joined Mar 2006 | Status: MQL developer | 47 Posts

Heino

Do use IndicatorCounted and don't re-invent the wheel.

MQL4: idea * experience + creative solution

#16
Edited 8:09pm Jun 4, 2007 7:00pm | Edited 8:09pm

RickD
| Joined Mar 2006 | Status: MQL developer | 47 Posts

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

Inserted 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;
  }
}

MQL4: idea * experience + creative solution

#17
Jun 5, 2007 3:49pm Jun 5, 2007 3:49pm

Heino
| Commercial User | Joined May 2007 | 199 Posts

Hello, how I can let draw simply a vertical line. I has tested however nothing fit.

I wont that it works like this

Inserted Code

if(a==b){
draw a vertical line!
}

#18
Jun 6, 2007 9:50am Jun 6, 2007 9:50am

RickD
| Joined Mar 2006 | Status: MQL developer | 47 Posts

Quoting Heino

Disliked
Hello, how I can let draw simply a vertical line. I has tested however nothing fit.

I wont that it works like this
Inserted Code
if(a==b){
draw a vertical line!
}
Ignored

Inserted Code

bool CreateVertLine(string name, datetime tm)
{
  bool bRet = ObjectCreate(name, OBJ_VLINE, 0, tm, 0);
  if (!bRet)
  {
     Print("Can't create vertical line! code #", GetLastError());
     return (false);
  }

   return (true);
}

MQL4: idea * experience + creative solution

#19
Jun 7, 2007 5:50am Jun 7, 2007 5:50am

Heino
| Commercial User | Joined May 2007 | 199 Posts

Hello and thank you very much for your help, I have testet now and get the error 4200 (Object exists) because there ist build a VLine in the past what I don´t have see in the chart without scrolling back.

I have use it for a Indicator and that also begins in the past to build the Vline and of this I don´t have see it.

What I wanted to do was let build a Vline by every be true of the if() question. Now I hope with this know I can loosen the problems that will come.

#20
Jun 7, 2007 7:40am Jun 7, 2007 7:40am

RickD
| Joined Mar 2006 | Status: MQL developer | 47 Posts

Quoting Heino

Disliked

Hello and thank you very much for your help, I have testet now and get the error 4200 (Object exists) because there ist build a VLine in the past what I don´t have see in the chart without scrolling back.

I have use it for a Indicator and that also begins in the past to build the Vline and of this I don´t have see it.

What I wanted to do was let build a Vline by every be true of the if() question. Now I hope with this know I can loosen the problems that will come.

Ignored

You can use the following approach:

Inserted Code

  if (ObjectFind(...) == -1) ObjectCreate(...);

MQL4: idea * experience + creative solution

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