MQL5 Programming Articles

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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Graphical Interfaces II: Setting Up the Event Handlers of the Library (Chapter 3)

The previous articles contain the implementation of the classes for creating constituent parts of the main menu. Now, it is time to take a close look at the event handlers in the principle base

MetaTrader 5 features hedging position accounting system

In order to expand possibilities of retail Forex traders, we have added the second accounting system — hedging. Now, it is possible to have multiple positions per symbol, including oppositely directed

Universal Expert Advisor: the Event Model and Trading Strategy Prototype (Part 2)

This article continues the series of publications on a universal Expert Advisor model. This part describes in detail the original event model based on centralized data processing, and considers the

Area method

The "area method" trading system works based on unusual interpretation of the RSI oscillator readings. The indicator that visualizes the area method, and the Expert Advisor that trades using this

Universal Expert Advisor: Trading Modes of Strategies (Part 1)

Any Expert Advisor developer, regardless of programming skills, is daily confronted with the same trading tasks and algorithmic problems, which should be solved to organize a reliable trading process

Graphical Interfaces II: the Separation Line and Context Menu Elements (Chapter 2)

In this article we will create the separation line element. It will be possible to use it not only as an independent interface element but also as a part of many other elements. After that, we will

Graphical Interfaces II: the Menu Item Element (Chapter 1)

In the second part of the series, we will show in detail the development of such interface elements as main menu and context menu. We will also mention drawing elements and create a special class for

Adding a control panel to an indicator or an Expert Advisor in no time

Have you ever felt the need to add a graphical panel to your indicator or Expert Advisor for greater speed and convenience? In this article, you will find out how to implement the dialog panel with

Graphical Interfaces I: Testing Library in Programs of Different Types and in the MetaTrader 4 Terminal (Chapter 5)

In the previous chapter of the first part of the series about graphical interfaces, the form class was enriched by methods which allowed managing the form by pressing its controls. In this article, we

Trading signals module using the system by Bill Williams

The article describes the rules of the trading system by Bill Williams, the procedure of application for a developed MQL5 module to search and mark patterns of this system on the chart, automated

Graphical Interfaces I: Functions for the Form Buttons and Deleting Interface Elements (Chapter 4)

In this article, we are going to continue developing the CWindow class by adding methods, which will allow managing the form by clicking on its controls. We will enable the program to be closed by a

Studying the CCanvas Class. Anti-aliasing and Shadows

An anti-aliasing algorithm of the CCanvas class is the base for all constructions where anti-aliasing is being used. The article contains information about how this algorithm operates, and provides

Graphical Interfaces I: Animating the Graphical Interface (Chapter 3)

In the previous article, we started developing a form class for controls. In this article, we are going to continue doing that by filling this class with methods for moving a form over the chart area

Rope Indicator by Erik Nayman

The article reveals how the "Rope" indicator is created based on "The Small Encyclopedia of Trader" by Erik L. Nayman. This indicator shows the direction of the trend using the calculated values of

Graphical Interfaces I: Form for Controls (Chapter 2)

In this article we will create the first and main element of the graphical interface - a form for controls. Multiple controls can be attached to this form anywhere and in any combination

Graphical Interfaces I: Preparation of the Library Structure (Chapter 1)

This article is the beginning of another series concerning development of graphical interfaces. Currently, there is not a single code library that would allow quick and easy creation of high quality

Market Theory

A logically complete market theory that would cover all types and varieties of markets for goods and services, micro and macro markets like Forex, hasn't been available until now. This article covers

MQL5 for beginners: Anti-vandal protection of graphic objects

What should your program do, if graphic control panels have been removed or modified by someone else? In this article we will show you how not to have "ownerless" objects on the chart, and how not to

Using Assertions in MQL5 Programs

This article covers the use of assertions in MQL5 language. It provides two examples of the assertion mechanism and some general guidance for implementing assertions

Error Handling and Logging in MQL5

This article focuses on general issues linked to handling software errors. Furthermore, the logging term is brought up and the examples of logging implementation with MQL5 tools are shown

Evaluation and selection of variables for machine learning models

This article focuses on specifics of choice, preconditioning and evaluation of the input variables (predictors) for use in machine learning models. New approaches and opportunities of deep predictor

Handling ZIP Archives in Pure MQL5

The MQL5 language keeps evolving, and its new features for working with data are constantly being added. Due to innovation it has recently become possible to operate with ZIP archives using regular

Indicator for Spindles Charting

The article regards spindle chart plotting and its usage in trading strategies and experts. First let's discuss the chart's appearance, plotting and connection with japanese candlestick chart. Next we

MQL5 Cookbook: Implementing Your Own Depth of Market

This article demonstrates how to utilize Depth of Market (DOM) programmatically and describes the operation principle of CMarketBook class, that can expand the Standard Library of MQL5 classes and

How to Secure Your Expert Advisor While Trading on the Moscow Exchange

The article delves into the trading methods ensuring the security of trading operations at the stock and low-liquidity markets through the example of Moscow Exchange's Derivatives Market. It brings

Drawing Resistance and Support Levels Using MQL5

This article describes a method of finding four extremum points for drawing support and resistance levels based on them. In order to find extremums on a chart of a currency pair, RSI indicator is

An Introduction to Fuzzy Logic

Fuzzy logic expands our boundaries of mathematical logic and set theory. This article reveals the basic principles of fuzzy logic as well as describes two fuzzy inference systems using Mamdani-type

Using Layouts and Containers for GUI Controls: The CGrid Class

This article presents an alternative method of GUI creation based on layouts and containers, using one layout manager — the CGrid class. The CGrid class is an auxiliary control that acts as a

Drawing Dial Gauges Using the CCanvas Class

We can find dial gauges in cars and airplanes, in industrial production and everyday life. They are used in all spheres which require quick response to behavior of a controlled value. This article

Using Layouts and Containers for GUI Controls: The CBox Class

This article presents an alternative method of GUI creation based on layouts and containers, using one layout manager — the CBox class. The CBox class is an auxiliary control that acts as a container

Tips for Selecting a Trading Signal to Subscribe. Step-By-Step Guide

This step-by-step guide is dedicated to the Signals service, examination of trading signals, a system approach to the search of a required signal which would satisfy criteria of profitability, risk

MQL5 Cookbook: Implementing an Associative Array or a Dictionary for Quick Data Access

This article describes a special algorithm allowing to gain access to elements by their unique keys. Any base data type can be used as a key. For example it may be represented as a string or an

Tips for Purchasing a Product on the Market. Step-By-Step Guide

This step-by-step guide provides tips and tricks for better understanding and searching for a required product. The article makes an attempt to puzzle out different methods of searching for an

Plotting trend lines based on fractals using MQL4 and MQL5

The article describes the automation of trend lines plotting based on the Fractals indicator using MQL4 and MQL5. The article structure provides a comparative view of the solution for two languages

Bi-Directional Trading and Hedging of Positions in MetaTrader 5 Using the HedgeTerminal API, Part 2

This article describes a new approach to hedging of positions and draws the line in the debates between users of MetaTrader 4 and MetaTrader 5 about this matter. It is a continuation of the first

Studying the CCanvas Class. How to Draw Transparent Objects

Do you need more than awkward graphics of moving averages? Do you want to draw something more beautiful than a simple filled rectangle in your terminal? Attractive graphics can be drawn in the

Optimization. A Few Simple Ideas

The optimization process can require significant resources of your computer or even of the MQL5 Cloud Network test agents. This article comprises some simple ideas that I use for work facilitation and

Bi-Directional Trading and Hedging of Positions in MetaTrader 5 Using the HedgeTerminal Panel, Part 1

This article describes a new approach to hedging of positions and draws the line in the debates between users of MetaTrader 4 and MetaTrader 5 about this matter. The algorithms making such hedging

Principles of Exchange Pricing through the Example of Moscow Exchange's Derivatives Market

This article describes the theory of exchange pricing and clearing specifics of Moscow Exchange's Derivatives Market. This is a comprehensive article for beginners who want to get their first exchange

MQL5 Cookbook: ОСО Orders

Any trader's trading activity involves various mechanisms and interrelationships including relations among orders. This article suggests a solution of OCO orders processing. Standard library classes