Articles on the MQL5 programming and use of trading robots

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Expert Advisors created for the MetaTrader platform perform a variety of functions implemented by their developers. Trading robots can track financial symbols 24 hours a day, copy deals, create and send reports, analyze news and even provide specific custom graphical interface.

The articles describe programming techniques, mathematical ideas for data processing, tips on creating and ordering of trading robots.

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MetaTrader 4 Expert Advisor exchanges information with the outside world
MetaTrader 4 Expert Advisor exchanges information with the outside world

MetaTrader 4 Expert Advisor exchanges information with the outside world

A simple, universal and reliable solution of information exchange between МetaТrader 4 Expert Advisor and the outside world. Suppliers and consumers of the information can be located on different computers, the connection is performed through the global IP addresses.
Change Expert Advisor Parameters From the User Panel "On the Fly"
Change Expert Advisor Parameters From the User Panel "On the Fly"

Change Expert Advisor Parameters From the User Panel "On the Fly"

This article provides a small example demonstrating the implementation of an Expert Advisor whose parameters can be controlled from the user panel. When changing the parameters "on the fly", the Expert Advisor writes the values obtained from the info panel to a file to further read them from the file and display accordingly on the panel. This article may be relevant to those who trade manually or in semi-automatic mode.
Order Strategies. Multi-Purpose Expert Advisor
Order Strategies. Multi-Purpose Expert Advisor

Order Strategies. Multi-Purpose Expert Advisor

This article centers around strategies that actively use pending orders, a metalanguage that can be created to formally describe such strategies and the use of a multi-purpose Expert Advisor whose operation is based on those descriptions
Neural Networks: From Theory to Practice
Neural Networks: From Theory to Practice

Neural Networks: From Theory to Practice

Nowadays, every trader must have heard of neural networks and knows how cool it is to use them. The majority believes that those who can deal with neural networks are some kind of superhuman. In this article, I will try to explain to you the neural network architecture, describe its applications and show examples of practical use.
Machine Learning: How Support Vector Machines can be used in Trading
Machine Learning: How Support Vector Machines can be used in Trading

Machine Learning: How Support Vector Machines can be used in Trading

Support Vector Machines have long been used in fields such as bioinformatics and applied mathematics to assess complex data sets and extract useful patterns that can be used to classify data. This article looks at what a support vector machine is, how they work and why they can be so useful in extracting complex patterns. We then investigate how they can be applied to the market and potentially used to advise on trades. Using the Support Vector Machine Learning Tool, the article provides worked examples that allow readers to experiment with their own trading.
How to Test a Trading Robot Before Buying
How to Test a Trading Robot Before Buying

How to Test a Trading Robot Before Buying

Buying a trading robot on MQL5 Market has a distinct benefit over all other similar options - an automated system offered can be thoroughly tested directly in the MetaTrader 5 terminal. Before buying, an Expert Advisor can and should be carefully run in all unfavorable modes in the built-in Strategy Tester to get a complete grasp of the system.
How to Write a Good Description for a Market Product
How to Write a Good Description for a Market Product

How to Write a Good Description for a Market Product

MQL5 Market has many products for sale but some of their descriptions leave much to be desired. Many texts are obviously in need of improvement, as common traders are not able to comprehend them. This article will help you to put your product in a favorable light. Use our recommendations to write an eye-catching description that will easily show your customers what exactly you are selling.
Statistical Carry Trade Strategy
Statistical Carry Trade Strategy

Statistical Carry Trade Strategy

An algorithm of statistical protection of open positive swap positions from unwanted price movements. This article features a variant of the carry trade protection strategy that allows to compensate for potential risk of the price movement in the direction opposite to that of the open position.
Quick Start: Short Guide for Beginners
Quick Start: Short Guide for Beginners

Quick Start: Short Guide for Beginners

Hello dear reader! In this article, I will try to explain and show you how you can easily and quickly get the hang of the principles of creating Expert Advisors, working with indicators, etc. It is beginner-oriented and will not feature any difficult or abstruse examples.
Automata-Based Programming as a New Approach to Creating Automated Trading Systems
Automata-Based Programming as a New Approach to Creating Automated Trading Systems

Automata-Based Programming as a New Approach to Creating Automated Trading Systems

This article takes us to a whole new direction in developing EAs, indicators and scripts in MQL4 and MQL5. In the future, this programming paradigm will gradually become the base standard for all traders in implementation of EAs. Using the automata-based programming paradigm, the MQL5 and MetaTrader 5 developers will be anywhere near being able to create a new language - MQL6 - and a new platform - MetaTrader 6.
Exploring Trading Strategy Classes of the Standard Library - Customizing Strategies
Exploring Trading Strategy Classes of the Standard Library - Customizing Strategies

Exploring Trading Strategy Classes of the Standard Library - Customizing Strategies

In this article we are going to show how to explore the Standard Library of Trading Strategy Classes and how to add Custom Strategies and Filters/Signals using the Patterns-and-Models logic of the MQL5 Wizard. In the end you will be able easily add your own strategies using MetaTrader 5 standard indicators, and MQL5 Wizard will create a clean and powerful code and fully functional Expert Advisor.
How to purchase a trading robot from the MetaTrader Market and to install it?
How to purchase a trading robot from the MetaTrader Market and to install it?

How to purchase a trading robot from the MetaTrader Market and to install it?

A product from the MetaTrader Market can be purchased on the MQL5.com website or straight from the MetaTrader 4 and MetaTrader 5 trading platforms. Choose a desired product that suits your trading style, pay for it using your preferred payment method, and activate the product.
Trade Operations in MQL5 - It's Easy
Trade Operations in MQL5 - It's Easy

Trade Operations in MQL5 - It's Easy

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.
Money-Making Algorithms Employing Trailing Stop
Money-Making Algorithms Employing Trailing Stop

Money-Making Algorithms Employing Trailing Stop

This article's objective is to study profitability of algorithms with different entries into trades and exits using trailing stop. Entry types to be used are random entry and reverse entry. Stop orders to be used are trailing stop and trailing take. The article demonstrates money-making algorithms with a profitability of about 30% per annum.
Why Is MQL5 Market the Best Place for Selling Trading Strategies and Technical Indicators
Why Is MQL5 Market the Best Place for Selling Trading Strategies and Technical Indicators

Why Is MQL5 Market the Best Place for Selling Trading Strategies and Technical Indicators

MQL5.community Market provides Expert Advisors developers with the already formed market consisting of thousands of potential customers. This is the best place for selling trading robots and technical indicators!
Limitless Opportunities with MetaTrader 5 and MQL5
Limitless Opportunities with MetaTrader 5 and MQL5

Limitless Opportunities with MetaTrader 5 and MQL5

In this article, I would like to give an example of what a trader's program can be like as well as what results can be achieved in 9 months, having started to learn MQL5 from scratch. This example will also show how multi-functional and informative such a program can be for a trader while taking minimum space on the price chart. And we will be able to see just how colorful, bright and intuitively clear to the user trade information panels can get. As well as many other features...
A Few Tips for First-Time Customers
A Few Tips for First-Time Customers

A Few Tips for First-Time Customers

A proverbial wisdom often attributed to various famous people says: "He who makes no mistakes never makes anything." Unless you consider idleness itself a mistake, this statement is hard to argue with. But you can always analyze the past mistakes (your own and of others) to minimize the number of your future mistakes. We are going to attempt to review possible situations arising when executing jobs in the same-name service.
How to Develop an Expert Advisor using UML Tools
How to Develop an Expert Advisor using UML Tools

How to Develop an Expert Advisor using UML Tools

This article discusses creation of Expert Advisors using the UML graphical language, which is used for visual modeling of object-oriented software systems. The main advantage of this approach is the visualization of the modeling process. The article contains an example that shows modeling of the structure and properties of an Expert Advisor using the Software Ideas Modeler.
Simple Trading Systems Using Semaphore Indicators
Simple Trading Systems Using Semaphore Indicators

Simple Trading Systems Using Semaphore Indicators

If we thoroughly examine any complex trading system, we will see that it is based on a set of simple trading signals. Therefore, there is no need for novice developers to start writing complex algorithms immediately. This article provides an example of a trading system that uses semaphore indicators to perform deals.
Multiple Regression Analysis. Strategy Generator and Tester in One
Multiple Regression Analysis. Strategy Generator and Tester in One

Multiple Regression Analysis. Strategy Generator and Tester in One

The article gives a description of ways of use of the multiple regression analysis for development of trading systems. It demonstrates the use of the regression analysis for strategy search automation. A regression equation generated and integrated in an EA without requiring high proficiency in programming is given as an example.
The All or Nothing Forex Strategy
The All or Nothing Forex Strategy

The All or Nothing Forex Strategy

The purpose of this article is to create the most simple trading strategy that implements the "All or Nothing" gaming principle. We don't want to create a profitable Expert Advisor - the goal is to increase the initial deposit several times with the highest possible probability. Is it possible to hit the jackpot on ForEx or lose everything without knowing anything about technical analysis and without using any indicators?
Creating Expert Advisors Using Expert Advisor Visual Wizard
Creating Expert Advisors Using Expert Advisor Visual Wizard

Creating Expert Advisors Using Expert Advisor Visual Wizard

Expert Advisor Visual Wizard for MetaTrader 5 provides a highly intuitive graphical environment with a comprehensive set of predefined trading blocks that let you design Expert Advisors in minutes. The click, drag and drop approach of Expert Advisor Visual Wizard allows you to create visual representations of forex trading strategies and signals as you would with pencil and paper. These trading diagrams are analyzed automatically by Molanis’ MQL5 code generator that transforms them into ready to use Expert Advisors. The interactive graphical environment simplifies the design process and eliminates the need to write MQL5 code.
The Role of Statistical Distributions in Trader's Work
The Role of Statistical Distributions in Trader's Work

The Role of Statistical Distributions in Trader's Work

This article is a logical continuation of my article Statistical Probability Distributions in MQL5 which set forth the classes for working with some theoretical statistical distributions. Now that we have a theoretical base, I suggest that we should directly proceed to real data sets and try to make some informational use of this base.
Using MetaTrader 5 as a Signal Provider for MetaTrader 4
Using MetaTrader 5 as a Signal Provider for MetaTrader 4

Using MetaTrader 5 as a Signal Provider for MetaTrader 4

Analyse and examples of techniques how trading analysis can be performed on MetaTrader 5 platform, but executed by MetaTrader 4. Article will show you how to create simple signal provider in your MetaTrader 5, and connect to it with multiple clients, even running MetaTrader 4. Also you will find out how you can follow participants of Automated Trading Championship in your real MetaTrader 4 account.
Creating MQL5 Expert Advisors in minutes using EA Tree: Part One
Creating MQL5 Expert Advisors in minutes using EA Tree: Part One

Creating MQL5 Expert Advisors in minutes using EA Tree: Part One

EA Tree is the first drag and drop MetaTrader MQL5 Expert Advisor builder. You can create complex MQL5 using a very easy to use graphical user interface. In EA Tree, Expert Advisors are created by connecting boxes together. Boxes may contain MQL5 functions, technical indicators, custom indicators, or values. Using the "tree of boxes", EA Tree generates the MQL5 code of the Expert Advisor.
Applying The Fisher Transform and Inverse Fisher Transform to Markets Analysis in MetaTrader 5
Applying The Fisher Transform and Inverse Fisher Transform to Markets Analysis in MetaTrader 5

Applying The Fisher Transform and Inverse Fisher Transform to Markets Analysis in MetaTrader 5

We now know that probability density function (PDF) of a market cycle does not remind a Gaussian but rather a PDF of a sine wave and most of the indicators assume that the market cycle PDF is Gaussian we need a way to "correct" that. The solution is to use Fisher Transform. The Fisher transform changes PDF of any waveform to approximately Gaussian. This article describes the mathematics behind the Fisher Transform and the Inverse Fisher Transform and their application to trading. A proprietary trading signal module based on the Inverse Fisher Transform is presented and evaluated.
The Player of Trading Based on Deal History
The Player of Trading Based on Deal History

The Player of Trading Based on Deal History

The player of trading. Only four words, no explanation is needed. Thoughts about a small box with buttons come to your mind. Press one button - it plays, move the lever - the playback speed changes. In reality, it is pretty similar. In this article, I want to show my development that plays trade history almost like it is in real time. The article covers some nuances of OOP, working with indicators and managing charts.
MQL5 Wizard for Dummies
MQL5 Wizard for Dummies

MQL5 Wizard for Dummies

In early 2011 we released the first version of the MQL5 Wizard. This new application provides a simple and convenient tool to automatically generate trading robots. Any MetaTrader 5 user can create a custom Expert Advisor without even knowing how to program in MQL5.
MQL5 Wizard: New Version
MQL5 Wizard: New Version

MQL5 Wizard: New Version

The article contains descriptions of the new features available in the updated MQL5 Wizard. The modified architecture of signals allow creating trading robots based on the combination of various market patterns. The example contained in the article explains the procedure of interactive creation of an Expert Advisor.
How to Order an Expert Advisor and Obtain the Desired Result
How to Order an Expert Advisor and Obtain the Desired Result

How to Order an Expert Advisor and Obtain the Desired Result

How to write correctly the Requirement Specifications? What should and should not be expected from a programmer when ordering an Expert Advisor or an indicator? How to keep a dialog, what moments to pay special attention to? This article gives the answers to these, as well as to many other questions, which often don't seem obvious to many people.
Expert Advisor based on the "New Trading Dimensions" by Bill Williams
Expert Advisor based on the "New Trading Dimensions" by Bill Williams

Expert Advisor based on the "New Trading Dimensions" by Bill Williams

In this article I will discuss the development of Expert Advisor, based on the book "New Trading Dimensions: How to Profit from Chaos in Stocks, Bonds, and Commodities" by Bill Williams. The strategy itself is well known and its use is still controversial among traders. The article considers trading signals of the system, the specifics of its implementation, and the results of testing on historical data.
Filtering Signals Based on Statistical Data of Price Correlation
Filtering Signals Based on Statistical Data of Price Correlation

Filtering Signals Based on Statistical Data of Price Correlation

Is there any correlation between the past price behavior and its future trends? Why does the price repeat today the character of its previous day movement? Can the statistics be used to forecast the price dynamics? There is an answer, and it is positive. If you have any doubt, then this article is for you. I'll tell how to create a working filter for a trading system in MQL5, revealing an interesting pattern in price changes.
Implementation of Indicators as Classes by Examples of Zigzag and ATR
Implementation of Indicators as Classes by Examples of Zigzag and ATR

Implementation of Indicators as Classes by Examples of Zigzag and ATR

Debate about an optimal way of calculating indicators is endless. Where should we calculate the indicator values - in the indicator itself or embed the entire logic in a Expert Advisor that uses it? The article describes one of the variants of moving the source code of a custom indicator iCustom right in the code of an Expert Advisor or script with optimization of calculations and modeling the prev_calculated value.
Parallel Calculations in MetaTrader 5
Parallel Calculations in MetaTrader 5

Parallel Calculations in MetaTrader 5

Time has been a great value throughout the history of mankind, and we strive not to waste it unnecessarily. This article will tell you how to accelerate the work of your Expert Advisor if your computer has a multi-core processor. Moreover, the implementation of the proposed method does not require the knowledge of any other languages besides MQL5.
The Implementation of a Multi-currency Mode in MetaTrader 5
The Implementation of a Multi-currency Mode in MetaTrader 5

The Implementation of a Multi-currency Mode in MetaTrader 5

For a long time multi-currency analysis and multi-currency trading has been of interest to people. The opportunity to implement a full fledged multi-currency regime became possible only with the public release of MetaTrader 5 and the MQL5 programming language. In this article we propose a way to analyze and process all incoming ticks for several symbols. As an illustration, let's consider a multi-currency RSI indicator of the USDx dollar index.
MQL5 Wizard: How to Create a Risk and Money Management Module
MQL5 Wizard: How to Create a Risk and Money Management Module

MQL5 Wizard: How to Create a Risk and Money Management Module

The generator of trading strategies of the MQL5 Wizard greatly simplifies testing of trading ideas. The article describes how to develop a custom risk and money management module and enable it in the MQL5 Wizard. As an example we've considered a money management algorithm, in which the size of the trade volume is determined by the results of the previous deal. The structure and format of description of the created class for the MQL5 Wizard are also discussed in the article.
How to Copy Trading from MetaTrader 5 to MetaTrader 4
How to Copy Trading from MetaTrader 5 to MetaTrader 4

How to Copy Trading from MetaTrader 5 to MetaTrader 4

Is it possible to trade on a real MetaTrader 5 account today? How to organize such trading? The article contains the theory of these questions and the working codes used for copying trades from the MetaTrader 5 terminal to MetaTrader 4. The article will be useful both for the developers of Expert Advisors and for practicing traders.
MQL5 Wizard: How to Create a Module of Trading Signals
MQL5 Wizard: How to Create a Module of Trading Signals

MQL5 Wizard: How to Create a Module of Trading Signals

The article discusses how to write your own class of trading signals with the implementation of signals on the crossing of the price and the moving average, and how to include it to the generator of trading strategies of the MQL5 Wizard, as well as describes the structure and format of the description of the generated class for the MQL5 Wizard.
MQL5 Wizard: Creating Expert Advisors without Programming
MQL5 Wizard: Creating Expert Advisors without Programming

MQL5 Wizard: Creating Expert Advisors without Programming

Do you want to try out a trading strategy while wasting no time for programming? In MQL5 Wizard you can simply select the type of trading signals, add modules of trailing positions and money management - and your work is done! Create your own implementations of modules or order them via the Jobs service - and combine your new modules with existing ones.
The Use of the MQL5 Standard Trade Class libraries in writing an Expert Advisor
The Use of the MQL5 Standard Trade Class libraries in writing an Expert Advisor

The Use of the MQL5 Standard Trade Class libraries in writing an Expert Advisor

This article explains how to use the major functionalities of the MQL5 Standard Library Trade Classes in writing Expert Advisors which implements position closing and modifying, pending order placing and deletion and verifying of Margin before placing a trade. We have also demonstrated how Trade classes can be used to obtain order and deal details.