MQL4 and MQL5 Programming Articles

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Study the MQL5 language for programming trading strategies in numerous published articles mostly written by you - the community members. The articles are grouped into categories to help you quicker find answers to any questions related to programming: Integration, Tester, Trading Strategies, etc.

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Better Programmer (Part 06): 9 habits that lead to effective coding

It's not always all about writing the code that leads to effective coding. There are certain habits that I have found in my experience that lead to effective coding. We are going to discuss some of

Graphics in DoEasy library (Part 83): Class of the abstract standard graphical object

In this article, I will create the class of the abstract graphical object. This object is to serve as a basis for creating the class of standard graphical objects. Graphical objects feature multiple

Dealing with Time (Part 2): The Functions

Determing the broker offset and GMT automatically. Instead of asking the support of your broker, from whom you will probably receive an insufficient answer (who would be willing to explain a missing

Combinatorics and probability theory for trading (Part III): The first mathematical model

A logical continuation of the earlier discussed topic would be the development of multifunctional mathematical models for trading tasks. In this article, I will describe the entire process related to

Dealing with Time (Part 1): The Basics

Functions and code snippets that simplify and clarify the handling of time, broker offset, and the changes to summer or winter time. Accurate timing may be a crucial element in trading. At the current

Graphics in DoEasy library (Part 82): Library objects refactoring and collection of graphical objects

In this article, I will improve all library objects by assigning a unique type to each object and continue the development of the library graphical objects collection class

Combinatorics and probability theory for trading (Part II): Universal fractal

In this article, we will continue to study fractals and will pay special attention to summarizing all the material. To do this, I will try to bring all earlier developments into a compact form which

Graphics in DoEasy library (Part 81): Integrating graphics into library objects

It is time to start the integration of the already created objects into the previously created library objects. This will ultimately endow each library object with its own graphical object allowing

Better programmer (Part 05): How to become a faster developer

Every developer wants to be able to write code faster, and being able to code faster and effective is not some kind of special ability that only a few people are born with. It's a skill that can be

Graphics in DoEasy library (Part 80): "Geometric animation frame" object class

In this article, I will optimize the code of classes from the previous articles and create the geometric animation frame object class allowing us to draw regular polygons with a given number of

Exploring options for creating multicolored candlesticks

In this article I will address the possibilities of creating customized indicators with candlesticks, pointing out their advantages and disadvantages

Bid/Ask spread analysis in MetaTrader 5

An indicator to report your brokers Bid/Ask spread levels. Now we can use MT5s tick data to analyze what the historic true average Bid/Ask spread actually have recently been. You shouldn't need to

Graphics in DoEasy library (Part 79): "Animation frame" object class and its descendant objects

In this article, I will develop the class of a single animation frame and its descendants. The class is to allow drawing shapes while maintaining and then restoring the background under them

Combinatorics and probability theory for trading (Part I): The basics

In this series of article, we will try to find a practical application of probability theory to describe trading and pricing processes. In the first article, we will look into the basics of

Better Programmer (Part 04): How to become a faster developer

Every developer wants to be able to write code faster, and being able to code faster and effective is not some kind of special ability that only a few people are born with. It's a skill that can be

Better Programmer (Part 03): Give Up doing these 5 things to become a successful MQL5 Programmer

This is the must-read article for anyone wanting to improve their programming career. This article series is aimed at making you the best programmer you can possibly be, no matter how experienced you

Patterns with Examples (Part I): Multiple Top

This is the first article in a series related to reversal patterns in the framework of algorithmic trading. We will begin with the most interesting pattern family, which originate from the Double Top

Better Programmer (Part 02): Stop doing these 5 things to become a successful MQL5 programmer

This is the must read article for anyone wanting to improve their programming career. This article series is aimed at making you the best programmer you can possibly be, no matter how experienced you

Graphics in DoEasy library (Part 78): Animation principles in the library. Image slicing

In this article, I will define the animation principles to be used in some parts of the library. I will also develop a class for copying a part of the image and pasting it to a specified form object

Better Programmer (Part 01): You must stop doing these 5 things to become a successful MQL5 programmer

There are a lot of bad habits that newbies and even advanced programmers are doing that are keeping them from becoming the best they can be to their coding career. We are going to discuss and address

Graphics in DoEasy library (Part 77): Shadow object class

In this article, I will create a separate class for the shadow object, which is a descendant of the graphical element object, as well as add the ability to fill the object background with a gradient

Graphics in DoEasy library (Part 76): Form object and predefined color themes

In this article, I will describe the concept of building various library GUI design themes, create the Form object, which is a descendant of the graphical element class object, and prepare data for

Graphics in DoEasy library (Part 75): Methods of handling primitives and text in the basic graphical element

In this article, I will continue the development of the basic graphical element class of all library graphical objects powered by the CCanvas Standard Library class. I will create the methods for

Graphics in DoEasy library (Part 74): Basic graphical element powered by the CCanvas class

In this article, I will rework the concept of building graphical objects from the previous article and prepare the base class of all graphical objects of the library powered by the Standard Library

Graphics in DoEasy library (Part 73): Form object of a graphical element

The article opens up a new large section of the library for working with graphics. In the current article, I will create the mouse status object, the base object of all graphical elements and the

Cluster analysis (Part I): Mastering the slope of indicator lines

Cluster analysis is one of the most important elements of artificial intelligence. In this article, I attempt applying the cluster analysis of the indicator slope to get threshold values for

Other classes in DoEasy library (Part 72): Tracking and recording chart object parameters in the collection

In this article, I will complete working with chart object classes and their collection. I will also implement auto tracking of changes in chart properties and their windows, as well as saving new

Tips from a professional programmer (Part II): Storing and exchanging parameters between an Expert Advisor, scripts and external programs

These are some tips from a professional programmer about methods, techniques and auxiliary tools which can make programming easier. We will discuss parameters which can be restored after terminal

Other classes in DoEasy library (Part 71): Chart object collection events

In this article, I will create the functionality for tracking some chart object events — adding/removing symbol charts and chart subwindows, as well as adding/removing/changing indicators in chart

Swaps (Part I): Locking and Synthetic Positions

In this article I will try to expand the classic concept of swap trading methods. I will explain why I have come to the conclusion that this concept deserves special attention and is absolutely

Other classes in DoEasy library (Part 70): Expanding functionality and auto updating the chart object collection

In this article, I will expand the functionality of chart objects and arrange navigation through charts, creation of screenshots, as well as saving and applying templates to charts. Also, I will

Tips from a professional programmer (Part I): Code storing, debugging and compiling. Working with projects and logs

These are some tips from a professional programmer about methods, techniques and auxiliary tools which can make programming easier

Combination scalping: analyzing trades from the past to increase the performance of future trades

The article provides the description of the technology aimed at increasing the effectiveness of any automated trading system. It provides a brief explanation of the idea, as well as its underlying

MVC design pattern and its possible application

The article discusses a popular MVC pattern, as well as the possibilities, pros and cons of its usage in MQL programs. The idea is to split an existing code into three separate components: Model, View

Other classes in DoEasy library (Part 69): Chart object collection class

With this article, I start the development of the chart object collection class. The class will store the collection list of chart objects with their subwindows and indicators providing the ability to

Other classes in DoEasy library (Part 68): Chart window object class and indicator object classes in the chart window

In this article, I will continue the development of the chart object class. I will add the list of chart window objects featuring the lists of available indicators

Neural networks made easy (Part 13): Batch Normalization

In the previous article, we started considering methods aimed at improving neural network training quality. In this article, we will continue this topic and will consider another approach — batch data

Other classes in DoEasy library (Part 67): Chart object class

In this article, I will create the chart object class (of a single trading instrument chart) and improve the collection class of MQL5 signal objects so that each signal object stored in the collection

Brute force approach to pattern search (Part IV): Minimal functionality

The article presents an improved brute force version, based on the goals set in the previous article. I will try to cover this topic as broadly as possible using Expert Advisors with settings obtained

Other classes in DoEasy library (Part 66): MQL5.com Signals collection class

In this article, I will create the signal collection class of the MQL5.com Signals service with the functions for managing signals. Besides, I will improve the Depth of Market snapshot object class