Discussion of article "Trade Operations in MQL5 - It's Easy"

MetaQuotes 2012.08.21 15:05

New article Trade Operations in MQL5 - It's Easy is published:

Almost all traders come to market to make money but some traders also enjoy the process itself. However, it is not only manual trading that can provide you with an exciting experience. Automated trading systems development can also be quite absorbing. Creating a trading robot can be as interesting as reading a good mystery novel.

When developing a trading algorithm, we have to deal with plenty of technical issues including the most important ones:

What to trade?
When to trade?
How to trade?

We need to answer the first question to choose the most suitable symbol. Our choice can be affected by many factors including the ability to automate our trading system for the market. The second question involves elaboration of the trading rules clearly indicating deals' direction, as well as entry and exit points. The third question seems to be relatively simple: how to buy and sell using some definite programming language?

In this article we will consider how to implement trade operations in algorithmic trading using MQL5 language.

Author: MetaQuotes

[Deleted] 2016.01.17 17:02 #1

This is YUGE help to jump start your EA programming.

makk 2016.07.05 16:24 #2

Good Introduction to Object Oriented Programming in MQL5.

With MT5 build 1347 the first code example fails to compile with error "illegal switch expression type".

I had to add casting to int in switch statements in AccountInfo.mqh to make it work, like:

switch((int)MarginMode())

Any rookie question, so Need moneymanagement LOT size Coding help

redcaxtus638 2017.10.26 14:45 #3

Good

NGUYEN TRUNG 2017.11.16 00:12 #4

makk:

Good Introduction to Object Oriented Programming in MQL5.

With MT5 build 1347 the first code example fails to compile with error "illegal switch expression type".

I had to add casting to int in switch statements in AccountInfo.mqh to make it work, like:

switch((int)MarginMode())

pdev 2017.12.26 09:09 #5

Hi, Thanks for this very helpful post and please help me resolve this. I am new to MT5 and am learning to create EAs so I copied sample code to execute Ctrade.Buy but the backtest failed. Here's more info:

1) Account: Its a live account with base currency as NZD

2) MetaEditor settings for backtest:

Options

3) Code: Copied from https://www.mql5.com/en/articles/481:

//+------------------------------------------------------------------+

//| demo.mq5 |

//| https://www.mql5.com |

//+------------------------------------------------------------------+

#property link "https://www.mql5.com"

#property version "1.00"

#include<Trade\Trade.mqh>

//--- object for performing trade operations

CTrade trade;

//+------------------------------------------------------------------+

//| Expert initialization function |

//+------------------------------------------------------------------+

int OnInit()

{

//--- set MagicNumber for your orders identification

int MagicNumber=123456;

trade.SetExpertMagicNumber(MagicNumber);

//--- set available slippage in points when buying/selling

int deviation=10;

trade.SetDeviationInPoints(deviation);

//--- order execution mode

trade.SetTypeFilling(ORDER_FILLING_RETURN);

//--- logging mode: it would be better not to declare this method at all, the class will set the best mode on its own

trade.LogLevel(1);

//--- what function is to be used for trading: true - OrderSendAsync(), false - OrderSend()

trade.SetAsyncMode(true);

//---

return(0);

}

//+------------------------------------------------------------------+

//| Expert deinitialization function |

//+------------------------------------------------------------------+

void OnDeinit(const int reason)

{

//---

}

//+------------------------------------------------------------------+

//| Expert tick function |

//+------------------------------------------------------------------+

void OnTick()

{

BuySample1();

}

//--- Buy sample

//+------------------------------------------------------------------+

//| Buying a specified volume at the current symbol |

//+------------------------------------------------------------------+

void BuySample1()

{

//--- 1. example of buying at the current symbol

if(!trade.Buy(0.1))

{

//--- failure message

Print("Buy() method failed. Return code=",trade.ResultRetcode(),

". Code description: ",trade.ResultRetcodeDescription());

}

else

{

Print("Buy() method executed successfully. Return code=",trade.ResultRetcode(),

" (",trade.ResultRetcodeDescription(),")");

}

//---

}

4) Error log (Please note that I am testing only on EUR/USD):

GJ 0 19:36:44.410 127.0.0.1 login (build 1730)

HH 0 19:36:44.420 Network 38520 bytes of account info loaded

JO 0 19:36:44.420 Network 1482 bytes of tester parameters loaded

QE 0 19:36:44.420 Network 188 bytes of input parameters loaded

FR 0 19:36:44.421 Network 443 bytes of symbols list loaded

IF 0 19:36:44.421 Tester expert file added: Experts\demo.ex5. 46684 bytes loaded

QH 0 19:36:44.433 Tester initial deposit 10000.00 NZD, leverage 1:100

JN 0 19:36:44.437 Tester successfully initialized

ES 0 19:36:44.437 Network 46 Kb of total initialization data received

PP 0 19:36:44.437 Tester Intel Core i7-4510U @ 2.00GHz, 8103 MB

RJ 0 19:36:44.799 Symbols EURUSD: symbol to be synchronized

HR 0 19:36:44.800 Symbols EURUSD: symbol synchronized, 3624 bytes of symbol info received

NJ 0 19:36:44.800 History EURUSD: history synchronization started

GO 0 19:36:44.856 History EURUSD: load 27 bytes of history data to synchronize in 0:00:00.000

RQ 0 19:36:44.856 History EURUSD: history synchronized from 2012.01.01 to 2017.11.15

EF 0 19:36:44.993 History EURUSD,Daily: history cache allocated for 1010 bars and contains 312 bars from 2014.01.01 00:00 to 2014.12.31 00:00

ND 0 19:36:44.993 History EURUSD,Daily: history begins from 2014.01.01 00:00

OL 0 19:36:44.996 Tester EURUSD,Daily (HalifaxPlus-Live): every tick generating

GN 0 19:36:44.996 Tester EURUSD,Daily: testing of Experts\demo.ex5 from 2015.01.01 00:00 to 2017.11.15 00:00 started

CK 0 19:36:56.288 Symbols NZDUSD: symbol to be synchronized

IS 0 19:36:56.288 Symbols NZDUSD: symbol synchronized, 3624 bytes of symbol info received

JL 0 19:36:56.288 History NZDUSD: history synchronization started

HJ 0 19:36:56.575 History NZDUSD: load 14 Kb of history data to synchronize in 0:00:00.078

LS 0 19:36:56.575 History NZDUSD: history synchronized from 2013.01.01 to 2017.11.15

CO 0 19:36:56.579 Symbols EURNZD: symbol to be synchronized

OJ 0 19:36:56.580 Symbols EURNZD: symbol synchronized, 3624 bytes of symbol info received

DL 0 19:36:56.580 History EURNZD: history synchronization started

MK 0 19:36:56.656 History EURNZD: load 27 bytes of history data to synchronize in 0:00:00.000

OD 0 19:36:56.656 History EURNZD: history synchronized from 2013.01.01 to 2017.11.15

IN 0 19:36:56.665 Trade 2015.01.02 03:00:00 market buy 0.10 EURUSD (1.20538 / 1.20549 / 1.20538)

PE 0 19:36:56.665 Trades 2015.01.02 03:00:00 deal #2 buy 0.10 EURUSD at 1.20549 done (based on order #2)

FH 0 19:36:56.666 Trade 2015.01.02 03:00:00 deal performed [#2 buy 0.10 EURUSD at 1.20549]

OG 0 19:36:56.666 Trade 2015.01.02 03:00:00 order performed buy 0.10 at 1.20549 [#2 buy 0.10 EURUSD at 1.20549]

FO 0 19:36:56.670 demo (EURUSD,D1) 2015.01.02 03:00:00 Buy() method executed successfully. Return code=10009 (done at 1.20549)

NM 2 19:37:15.823 History NZDUSD 2016.09.21 23:01:00: corrupted history detected (s:-73370, o:73433, h:+48, l:-123, c:-117 -- tv:63, rv:11250111)

JF 2 19:37:15.823 History NZDUSD 2016.09.21, bad container found, must be resynchronized

LQ 2 19:37:16.106 Tester history error 9 in undefined function

OH 2 19:37:16.106 Tester stopped on 0% of testing interval with error '20 NZDUSD'

Please tell me whats wrong and how do I resolve this?

Error "Corrupted history detected" Errors, bugs, questions Opening sell position in

Taiwo Okunbanjo 2018.07.29 11:50 #6

Good, a nice one indeed..

Andy Obama 2018.08.22 00:56 #7

<Deleted>

Cường Thiên 2018.12.18 13:56 #8

Andy Obama:

Keith Watford 2021.01.22 12:20 #9

Comments that do not relate to this topic, have been moved to "Off Topic Posts".

Huong Huong 2021.02.15 19:24 #10

pdev: