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MQL4 Programming

  • #101
  • Feb 9, 2018 6:47am Feb 9, 2018 6:47am
May be you required any library file or any base indicator ...
  • #102
  • Feb 9, 2018 9:31am Feb 9, 2018 9:31am
Quoting yousername
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.
Sorry for coming late, however, it is better to be late than never.

I register for class. thank you
  • #103
  • Feb 15, 2018 4:10am Feb 15, 2018 4:10am
Quoting nttfx
Complex programming like dashboard with button? No need auto trading. Just for monitoring and alert. I'll pm u @yousername.
How do you do PM at @username?
  • #104
  • Feb 15, 2018 5:53pm Feb 15, 2018 5:53pm
Hi, I'm Newbie of coding. Copy, Paste and edit is my Practice now, i facing some problem hope you guys can help me.
Please help to solve the error as below. Thanks

'Verbose' - variable not defined


Utility Functions
//=============================================================================
//=============================================================================
extern string OrderReliableErrTxt(int err)

{
return (err + " :: " + ErrorDescription(err));
}

void OrderReliablePrint(string s)

{

if(Verbose)Print(OrderReliable_Fname + " " + OrderReliableVersion + ": " + s);

}

string OrderTypeToString(int type)

{
if (type == OP_BUY) return("BUY");
if (type == OP_SELL) return("SELL");
if (type == OP_BUYSTOP) return("BUY STOP");
if (type == OP_SELLSTOP) return("SELL STOP");
if (type == OP_BUYLIMIT) return("BUY LIMIT");
if (type == OP_SELLLIMIT) return("SELL LIMIT");
return("None (" + type + ")");
}
  • #105
  • Feb 15, 2018 6:07pm Feb 15, 2018 6:07pm
Quoting JeremiahChia
Hi, I'm Newbie of coding. Copy, Paste and edit is my Practice now, i facing some problem hope you guys can help me. Please help to solve the error as below. Thanks 'Verbose' - variable not defined Utility Functions //============================================================================= //============================================================================= extern string OrderReliableErrTxt(int err) { return (err + " :: " + ErrorDescription(err)); } void OrderReliablePrint(string s) { if(Verbose)Print(OrderReliable_Fname + " " + OrderReliableVersion...
You didn't define your Boolean type Verbose variable. I guess you should pass its value as an argument in your OrderReliablePrint(string s, bool Verbose) function.
When you're not sure Short or Long - toss a coin! Chances are 50% !!!
  • #106
  • Feb 16, 2018 10:08am Feb 16, 2018 10:08am
Anyone willing to share sourcecode that can trade on any broker?
and avoid ordersend error like 131, 134 and so on.

And can handle:
ECN/STP
4/5 digits

Thanks!
Blindly following others will make you blind!
  • #107
  • Jun 17, 2018 7:28am Jun 17, 2018 7:28am
hey guys!

This is great thread, im subscribed
Are pro coders in this thread still active? I want to learn MQL4 programing. I want to make a simple indicator from my idea
Hope you guys help me!
happy trading!

Phong,
...want it most but use it worst!
  • #108
  • Jun 17, 2018 7:34am Jun 17, 2018 7:34am
Quoting aPhong
hey guys! This is great thread, im subscribed Are pro coders in this thread still active? I want to learn MQL4 programing. I want to make a simple indicator from my idea Hope you guys help me! happy trading! Phong,
Just look for mql4 lesson 1 on youtube
Happy trading
  • #109
  • Jul 25, 2018 3:57pm Jul 25, 2018 3:57pm
Since I'm Junior member I'm not able to start new thread so I will post my question here. I'm looking for the way to open indicator's settings using mql4. So far I managed to open window with indicators list using simple code simulating CTRL+I combination.

Inserted Code
#include <WinUser32.mqh>
#define VK_CONTROL 0x11
#define VK_I 0x49
 
keybd_event(VK_CONTROL,0,0,0);
keybd_event(VK_I,0,0,0);
keybd_event(VK_I,0,KEYEVENTF_KEYUP,0);
keybd_event(VK_CONTROL,0x11,KEYEVENTF_KEYUP,0);

Now I'm stuck with indicators list build with windows tree control and I cannot find a way to search for my indicator and select it in the list. Maybe someone has already encountered a similar problem and knows how to solve it? Thanks in advance!
  • #110
  • Nov 10, 2018 10:17am Nov 10, 2018 10:17am
Hi yousername

Appreciate if you would help me to identify the mistake

Trying to upload script for you cAlgo , It gives type error at 4 or five lines.

Would you please confirm if it works with MT4 and any guideline to for this type error.

I don't know much about programming language
have a great weekend
  • #111
  • Dec 26, 2018 12:50am Dec 26, 2018 12:50am
http://prntscr.com/lzmdgt
as per this image i want lines .. where ever the open price will be .. it show as per this image degree ... but i made is not able to do that one..
Inserted Code
void DoDailyRates(void)
{
   dopen=iTime(Symbol(),PERIOD_D1,0);
   ArrayCopyRates(Day_Price,(Symbol()), PERIOD_D1);   
   YdayClose =  iClose(Symbol(), PERIOD_D1, 1); // Day_Price[1][4];
   TdOpen =  iOpen(Symbol(), PERIOD_D1, 0);  
    Rc = (double(MathSqrt(TdOpen)));
    Rcl = ( Rc * Rc ) ;
 
// for (int i =11 ;i < Rcl; i++ )
 //{   if ( i>11 ) Rcl =  }  
   
  BLvl=  (double((MathSqrt(Rcl)+(0.25))*(MathSqrt(Rcl)+(0.25))) );
  SLvl=  (double((MathSqrt(Rcl)-(0.25))*(MathSqrt(Rcl)-(0.25))) );
 
   R1 =  (double((MathSqrt(Rcl)+(0.5))*(MathSqrt(Rcl)+(0.5))) );
   S1 =  (double((MathSqrt(Rcl)-(0.5))*(MathSqrt(Rcl)-(0.5))) );
   R2 = (double((MathSqrt(Rcl)+(0.75))*(MathSqrt(Rcl)+(0.75))) );
   S2 = (double((MathSqrt(Rcl)-(0.75))*(MathSqrt(Rcl)-(0.75))) );
 
   R3 = (double((MathSqrt(Rcl)+(1.0))*(MathSqrt(Rcl)+(1.0))) );
   S3 =  (double((MathSqrt(Rcl)-(1.0))*(MathSqrt(Rcl)-(1.0))) );
   R4 =  (double((MathSqrt(Rcl)+(1.25))*(MathSqrt(Rcl)+(1.25))) );
   S4 = (double((MathSqrt(Rcl)-(1.25))*(MathSqrt(Rcl)-(1.25))) );
   
   R5 =  (double((MathSqrt(Rcl)+(1.5))*(MathSqrt(Rcl)+(1.5))) );
   S5 =  (double((MathSqrt(Rcl)-(1.5))*(MathSqrt(Rcl)-(1.5))) );
   R6 =  (double((MathSqrt(Rcl)+(1.75))*(MathSqrt(Rcl)+(1.75))) );
   S6 =  (double((MathSqrt(Rcl)-(1.75))*(MathSqrt(Rcl)-(1.75))) );
    
   R7 = (double((MathSqrt(Rcl)+(2.0))*(MathSqrt(Rcl)+(2.0))) );
   S7 = (double((MathSqrt(Rcl)-(2.0))*(MathSqrt(Rcl)-(2.0))) );
i cant able to do the for program.. to make the open number at its degree.. for example 1315 is open means for this it show 0/360 deg but actually 1243 should show 0/360 deg.. then 1315 as 180 deg... for this how to code ..can you help on this
Success is a Journey Not a Destination....... kind regards ramzam
  • #112
  • Dec 27, 2018 12:14am Dec 27, 2018 12:14am
Why ERROR ?


bool ModifyOrder(double OrderOP,double OrderSL,color Color=CLR_NONE)
{ bool Success=false;
int retryTimes=5,i=0;
while(i<5&&!Success)
{ i+=1;
while(IsTradeContextBusy())Sleep(100);
if(IsStopped())return(-1);
Success=OrderModify(OrderTicket(),OrderOP,OrderSL,0,0,Color);
if(!Success)
{ Error=GetLastError();
if(Error>0)Print(" Error Modifying Order:",OrderTicket(),", ",Error," :" +ErrorDescription(Error),", Ask:",Ask,
", Bid:",Bid," OrderPrice: ",OrderOP," StopLevel: ",StopLevel,", SL: ",OrderSL,", OSL: ",OrderStopLoss());
else Success=true;
switch(Error)
{ case ERR_NO_ERROR:
case ERR_NO_RESULT:
i=retryTimes;
break;
case ERR_TRADE_MODIFY_DENIED:
Sleep(10000);
case ERR_OFF_QUOTES:
case ERR_INVALID_PRICE:
Sleep(5000);
case ERR_PRICE_CHANGED:
case ERR_REQUOTE:
RefreshRates();
case ERR_SERVER_BUSY:
case ERR_NO_CONNECTION:
case ERR_BROKER_BUSY:
case ERR_TRADE_CONTEXT_BUSY:
case ERR_TRADE_TIMEOUT:
i+=1;
break;
default:
i=retryTimes;
break;
}
}
else break;
}
return(Success);
}
Attached Image (click to enlarge)
Click to Enlarge Name: error mql4.png Size: 45 KB
Attached File(s)
File Type: mq4 Blessing 3 v3.9.6.09.mq4   111 KB | 483 downloads
  • #113
  • Dec 27, 2018 12:44am Dec 27, 2018 12:44am
Quoting Q_Mouze
Why ERROR ?
IsStopped() is a boolean type.
boolean only return either 0 or 1. (true/false)
return(-1) will give an error.
  • #114
  • Dec 27, 2018 2:36am Dec 27, 2018 2:36am
Hi, just want to help clarify two things...

First:
Quoting yousername
{quote} It is almost similar to constant (fixed) variable where you can't change the variable while the program run. #define FIB_SUP1 "FIB_SUP_1" #define FIB_SUP2 "FIB_SUP_2" #define FIB_SUP3 "FIB_SUP_3" #define FIB_RES1 "FIB_RES_1" #define FIB_RES2 "FIB_RES_2" #define FIB_RES3 "FIB_RES_3" To me the #FIB_SUP1 etc are fixed variable. But alternatively you can delete those #define thing and make a global/local variable.
Statements preceded by the hash (#) sign are preprocessor directives definitions, not fixed or const variables.
The preprocessor directives are resolved before compilation by the preprocessor. The preprocessor is a kind of parser that reads the code and replaces any directive by its definition, it's a kind of search/replace if you prefer.

So if you write this in your code :
Inserted Code
#define ARRAY_SIZE 100
 
int Array[ARRAY_SIZE]

The preprocessor will replace ARRAY_SIZE by its definition as this:
Inserted Code
 
int Array[100]

And then, will pass that code to the compiler.

Second:
Quoting Q_Mouze
Why ERROR ? bool ModifyOrder(double OrderOP,double OrderSL,color Color=CLR_NONE) { bool Success=false; int retryTimes=5,i=0; while(i<5&&!Success) { i+=1; while(IsTradeContextBusy())Sleep(100); if(IsStopped())return(-1); Success=OrderModify(OrderTicket(),OrderOP,OrderSL,0,0,Color); if(!Success) { Error=GetLastError(); if(Error>0)Print(" Error Modifying Order:",OrderTicket(),", ",Error," :" +ErrorDescription(Error),", Ask:",Ask, ", Bid:",Bid," OrderPrice: ",OrderOP," StopLevel: ",StopLevel,",...
What's wrong here is that you defined a Boolean function (see in blue) and you are returning an integer (see in red) which is not of type boolean ! And the compiler is telling it to you very clearly "expression not boolean" Modify your return statement to true or false, I think false in this case, and you will be okay.
Simplicity is the Ultimate Sophistication.
  • #115
  • Dec 27, 2018 3:56am Dec 27, 2018 3:56am
for this code Success=OrderModify(OrderTicket(),OrderOP,OrderSL,0,0,Color); , I will get Boolean or Integer ?
  • #116
  • Dec 27, 2018 4:31am Dec 27, 2018 4:31am
Quoting Q_Mouze
for this code Success=OrderModify(OrderTicket(),OrderOP,OrderSL,0,0,Color); , I will get Boolean or Integer ?
Man, you only need to look in the doc for that !

Attached Image (click to enlarge)
Click to Enlarge Name: Screenshot1.png Size: 79 KB
Simplicity is the Ultimate Sophistication.
  • #117
  • Dec 27, 2018 7:30pm Dec 27, 2018 7:30pm
Hello all, I have looked through this thread rather fast, My apologies in advance if I am throwing a wrench into the flow. I am having a problem figuring something out.

I would like to assign a variable 1 time on start up then be able to change that variable later. So an example is something like this.

bool canTrade = true; // PROBLEM WITH THIS IS THE SCRIPT DOES NOT ACCEPT IT HERE AS AN ASSIGNMENT, IF I MOVE TO UNDER OnTick() THEN IT JUST REASSIGNS THE VARIABLE MAKING IT POINTLESS

void OnTick()
}

if(canTrade == False)
{
"command to buy or sell"
static bool canTrade = false;


}
  • #118
  • Dec 29, 2018 11:41am Dec 29, 2018 11:41am
Quoting FiveOhOne
Hello all, I have looked through this thread rather fast, My apologies in advance if I am throwing a wrench into the flow. I am having a problem figuring something out. I would like to assign a variable 1 time on start up then be able to change that variable later. So an example is something like this. bool canTrade = true; // PROBLEM WITH THIS IS THE SCRIPT DOES NOT ACCEPT IT HERE AS AN ASSIGNMENT, IF I MOVE TO UNDER OnTick() THEN IT JUST REASSIGNS THE VARIABLE MAKING IT POINTLESS void OnTick() } if(canTrade == False) { "command to buy or sell"...

1. Why are we redeclaring canTrade again?
2. Either you have several typos on this post if not ...
- you didnt comment out one of the comments by using "//"
- the curly bracket of OnTick is to the wrong side
- You do need one more closing curly bracket at the end as you have opened a curly bracket for the if statement

I actually dont understand your purpose here,im just giving a general idea of what i think it should be


Inserted Code
bool canTrade = true; // PROBLEM WITH THIS IS THE SCRIPT DOES NOT ACCEPT IT HERE AS AN ASSIGNMENT, IF I MOVE TO UNDER OnTick() THEN IT JUST REASSIGNS THE VARIABLE MAKING IT POINTLESS
void OnTick()
{
if(canTrade == False)
{
//"command to buy or sell"
canTrade = false;
 
}
}
@fauzaanu on Telegram
  • #119
  • Dec 29, 2018 12:47pm Dec 29, 2018 12:47pm
Quoting FiveOhOne
Hello all, I have looked through this thread rather fast, My apologies in advance if I am throwing a wrench into the flow. I am having a problem figuring something out. I would like to assign a variable 1 time on start up then be able to change that variable later. So an example is something like this. bool canTrade = true; // PROBLEM WITH THIS IS THE SCRIPT DOES NOT ACCEPT IT HERE AS AN ASSIGNMENT, IF I MOVE TO UNDER OnTick() THEN IT JUST REASSIGNS THE VARIABLE MAKING IT POINTLESS void OnTick() } if(canTrade == False) { "command to buy or sell"...
You have the OnInit() function to initialize your variable once at script startup. If you knew the basics of mql programming, you would know that, so maybe you should start there...
Simplicity is the Ultimate Sophistication.
  • #120
  • Jan 13, 2019 10:29pm Jan 13, 2019 10:29pm
Quoting legendforex
Hi Can u plz make a profit closing EA for me ? if its possible , i will share my requirements Thanks and regards
just at this code to your EA, and ensure you place the function "CloseProfit" under the Ontick function:

extern int Takeprofit = 400; //your Fixed Take profit
extern int Slippage = 30;
double CurrentProfit;
int TotalOrders;
int MyMagic=554245147;
void CloseProfit()
{
TotalOrders=OrdersTotal();
if(TotalOrders==1)
{
if(OrderSelect(0,SELECT_BY_POS,MODE_TRADES))
if(OrderSymbol()==Symbol())
if(OrderMagicNumber()==MyMagic) //you can omit this line if your orders had no magic number.
if(OrderType()==OP_BUY)
{
CurrentProfit=OrderProfit();
if(CurrentProfit==Takeprofit)
{
OrderClose(OrderTicket(),OrderLots(),NormalizeDouble(MarketInfo(Symbol(),MODE_BID),Digits),Slippage,clrRed);

}


}
else
if(OrderType()==)OP_SELL)
{

CurrentProfit=OrderProfit();
if(CurrentProfit==Takeprofit)
{
OrderClose(OrderTicket(),OrderLots(),NormalizeDouble(MarketInfo(Symbol(),MODE_ASK),Digits),Slippage,clrRed);

}

}

}
else
if(TotalOrders>1)
{
for(int i=TotalOrders-1;i>=0;i--)
{

if(OrderSelect(i,SELECT_BY_POS,MODE_TRADES))
if(OrderSymbol()==Symbol())
if(OrderMagicNumber()==MyMagic) //you can omit this line if your orders had no magic number.
if(OrderType()==OP_BUY)
{
CurrentProfit=OrderProfit();
if(CurrentProfit==Takeprofit)
{
OrderClose(OrderTicket(),OrderLots(),NormalizeDouble(MarketInfo(Symbol(),MODE_BID),Digits),Slippage,clrRed);

}


}
else
if(OrderType()==)OP_SELL)
{

CurrentProfit=OrderProfit();
if(CurrentProfit==Takeprofit)
{
OrderClose(OrderTicket(),OrderLots(),NormalizeDouble(MarketInfo(Symbol(),MODE_ASK),Digits),Slippage,clrRed);

}

}



}







}


}
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