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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Comparing speeds of self-caching indicators
Comparing speeds of self-caching indicators

Comparing speeds of self-caching indicators

The article compares the classic MQL5 access to indicators with alternative MQL4-style methods. Several varieties of MQL4-style access to indicators are considered: with and without the indicator handles caching. Considering the indicator handles inside the MQL5 core is analyzed as well.
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How to create a graphical panel of any complexity level

How to create a graphical panel of any complexity level

The article features a detailed explanation of how to create a panel on the basis of the CAppDialog class and how to add controls to the panel. It provides the description of the panel structure and a scheme, which shows the inheritance of objects. From this article, you will also learn how events are handled and how they are delivered to dependent controls. Additional examples show how to edit panel parameters, such as the size and the background color.
Visualizing trading strategy optimization in MetaTrader 5
Visualizing trading strategy optimization in MetaTrader 5

Visualizing trading strategy optimization in MetaTrader 5

The article implements an MQL application with a graphical interface for extended visualization of the optimization process. The graphical interface applies the last version of EasyAndFast library. Many users may ask why they need graphical interfaces in MQL applications. This article demonstrates one of multiple cases where they can be useful for traders.
How to create Requirements Specification for ordering an indicator
How to create Requirements Specification for ordering an indicator

How to create Requirements Specification for ordering an indicator

Most often the first step in the development of a trading system is the creation of a technical indicator, which can identify favorable market behavior patterns. A professionally developed indicator can be ordered from the Freelance service. From this article you will learn how to create a proper Requirements Specification, which will help you to obtain the desired indicator faster.
Money Management by Vince. Implementation as a module for MQL5 Wizard
Money Management by Vince. Implementation as a module for MQL5 Wizard

Money Management by Vince. Implementation as a module for MQL5 Wizard

The article is based on 'The Mathematics of Money Management' by Ralph Vince. It provides the description of empirical and parametric methods used for finding the optimal size of a trading lot. Also the article features implementation of trading modules for the MQL5 Wizard based on these methods.
LifeHack for traders: Blending ForEach with defines (#define)
LifeHack for traders: Blending ForEach with defines (#define)

LifeHack for traders: Blending ForEach with defines (#define)

The article is an intermediate step for those who still writes in MQL4 and has no desire to switch to MQL5. We continue to search for opportunities to write code in MQL4 style. This time, we will look into the macro substitution of the #define preprocessor.
Controlled optimization: Simulated annealing
Controlled optimization: Simulated annealing

Controlled optimization: Simulated annealing

The Strategy Tester in the MetaTrader 5 trading platform provides only two optimization options: complete search of parameters and genetic algorithm. This article proposes a new method for optimizing trading strategies — Simulated annealing. The method's algorithm, its implementation and integration into any Expert Advisor are considered. The developed algorithm is tested on the Moving Average EA.
LifeHack for traders: Fast food made of indicators
LifeHack for traders: Fast food made of indicators

LifeHack for traders: Fast food made of indicators

If you have newly switched to MQL5, then this article will be useful. First, the access to the indicator data and series is done in the usual MQL4 style. Second, this entire simplicity is implemented in MQL5. All functions are as clear as possible and perfectly suited for step-by-step debugging.
Custom Strategy Tester based on fast mathematical calculations
Custom Strategy Tester based on fast mathematical calculations

Custom Strategy Tester based on fast mathematical calculations

The article describes the way to create a custom strategy tester and a custom analyzer of the optimization passes. After reading it, you will understand how the math calculations mode and the mechanism of so-called frames work, how to prepare and load custom data for calculations and use effective algorithms for their compression. This article will also be interesting to those interested in ways of storing custom information within an expert.
Automatic construction of support and resistance lines
Automatic construction of support and resistance lines

Automatic construction of support and resistance lines

The article deals with automatic construction of support/resistance lines using local tops and bottoms of price charts. The well-known ZigZag indicator is applied to define these extreme values.
Testing patterns that arise when trading currency pair baskets. Part III
Testing patterns that arise when trading currency pair baskets. Part III

Testing patterns that arise when trading currency pair baskets. Part III

In this article, we finish testing the patterns that can be detected when trading currency pair baskets. Here we present the results of testing the patterns tracking the movement of pair's currencies relative to each other.
The Channel Breakout pattern
The Channel Breakout pattern

The Channel Breakout pattern

Price trends form price channels that can be observed on financial symbol charts. The breakout of the current channel is one of the strong trend reversal signals. In this article, I suggest a way to automate the process of finding such signals and see if the channel breakout pattern can be used for creating a trading strategy.
How to reduce trader's risks
How to reduce trader's risks

How to reduce trader's risks

Trading in financial markets is associated with a whole range of risks that should be taken into account in the algorithms of trading systems. Reducing such risks is the most important task to make a profit when trading.
Automatic Selection of Promising Signals
Automatic Selection of Promising Signals

Automatic Selection of Promising Signals

The article is devoted to the analysis of trading signals for the MetaTrader 5 platform, which enable the automated execution of trading operations on subscribers' accounts. Also, the article considers the development of tools, which help search for potentially promising trading signals straight from the terminal.
Risk Evaluation in the Sequence of Deals with One Asset. Continued
Risk Evaluation in the Sequence of Deals with One Asset. Continued

Risk Evaluation in the Sequence of Deals with One Asset. Continued

The article develops the ideas proposed in the previous part and considers them further. It describes the problems of yield distributions, plotting and studying statistical regularities.
Night trading during the Asian session: How to stay profitable
Night trading during the Asian session: How to stay profitable

Night trading during the Asian session: How to stay profitable

The article deals with the concept of night trading, as well as trading strategies and their implementation in MQL5. We perform tests and make appropriate conclusions.
Momentum Pinball trading strategy
Momentum Pinball trading strategy

Momentum Pinball trading strategy

In this article, we continue to consider writing the code to trading systems described in a book by Linda B. Raschke and Laurence A. Connors “Street Smarts: High Probability Short-Term Trading Strategies”. This time we study Momentum Pinball system: there is described creation of two indicators, trade robot and signal block on it.
Creating a custom news feed for MetaTrader 5
Creating a custom news feed for MetaTrader 5

Creating a custom news feed for MetaTrader 5

In this article we look at the possibility of creating a flexible news feed that offers more options in terms of the type of news and also its source. The article will show how a web API can be integrated with the MetaTrader 5 terminal.
The NRTR indicator and trading modules based on NRTR for the MQL5 Wizard
The NRTR indicator and trading modules based on NRTR for the MQL5 Wizard

The NRTR indicator and trading modules based on NRTR for the MQL5 Wizard

In this article we are going to analyze the NRTR indicator and create a trading system based on this indicator. We are going to develop a module of trading signals that can be used in creating strategies based on a combination of NRTR with additional trend confirmation indicators.
Testing patterns that arise when trading currency pair baskets. Part II
Testing patterns that arise when trading currency pair baskets. Part II

Testing patterns that arise when trading currency pair baskets. Part II

We continue testing the patterns and trying the methods described in the articles about trading currency pair baskets. Let's consider in practice, whether it is possible to use the patterns of the combined WPR graph crossing the moving average. If the answer is yes, we should consider the appropriate usage methods.
Trading DiNapoli levels
Trading DiNapoli levels

Trading DiNapoli levels

The article considers one of the variants for Expert Advisor practical realization to trade DiNapoli levels using MQL5 standard tools. Its performance is tested and conclusions are made.
Creating a new trading strategy using a technology of resolving entries into indicators
Creating a new trading strategy using a technology of resolving entries into indicators

Creating a new trading strategy using a technology of resolving entries into indicators

The article suggests a technology helping everyone to create custom trading strategies by assembling an individual indicator set, as well as to develop custom market entry signals.
Resolving entries into indicators
Resolving entries into indicators

Resolving entries into indicators

Different situations happen in trader’s life. Often, the history of successful trades allows us to restore a strategy, while looking at a loss history we try to develop and improve it. In both cases, we compare trades with known indicators. This article suggests methods of batch comparison of trades with a number of indicators.
Using the Kalman Filter for price direction prediction
Using the Kalman Filter for price direction prediction

Using the Kalman Filter for price direction prediction

For successful trading, we almost always need indicators that can separate the main price movement from noise fluctuations. In this article, we consider one of the most promising digital filters, the Kalman filter. The article provides the description of how to draw and use the filter.
R-squared as an estimation of quality of the strategy balance curve
R-squared as an estimation of quality of the strategy balance curve

R-squared as an estimation of quality of the strategy balance curve

This article describes the construction of the custom optimization criterion R-squared. This criterion can be used to estimate the quality of a strategy's balance curve and to select the most smoothly growing and stable strategies. The work discusses the principles of its construction and statistical methods used in estimation of properties and quality of this metric.
Comparing different types of moving averages in trading
Comparing different types of moving averages in trading

Comparing different types of moving averages in trading

This article deals with seven types of moving averages (MA) and a trading strategy to work with them. We also test and compare various MAs at a single trading strategy and evaluate the efficiency of each moving average compared to others.
Triangular arbitrage
Triangular arbitrage

Triangular arbitrage

The article deals with the popular trading method - triangular arbitrage. Here we analyze the topic in as much detail as possible, consider the positive and negative aspects of the strategy and develop the ready-made Expert Advisor code.
Mini Market Emulator or Manual Strategy Tester
Mini Market Emulator or Manual Strategy Tester

Mini Market Emulator or Manual Strategy Tester

Mini Market Emulator is an indicator designed for partial emulation of work in the terminal. Presumably, it can be used to test "manual" strategies of market analysis and trading.
Fuzzy Logic in trading strategies
Fuzzy Logic in trading strategies

Fuzzy Logic in trading strategies

The article considers an example of applying the fuzzy logic to build a simple trading system, using the Fuzzy library. Variants for improving the system by combining fuzzy logic, genetic algorithms and neural networks are proposed.
A New Approach to Interpreting Classic and Hidden Divergence
A New Approach to Interpreting Classic and Hidden Divergence

A New Approach to Interpreting Classic and Hidden Divergence

The article considers the classic method for divergence construction and provides an additional divergence interpretation method. A trading strategy was developed based on this new interpretation method. This strategy is also described in the article.
Optimizing a strategy using balance graph and comparing results with "Balance + max Sharpe Ratio" criterion
Optimizing a strategy using balance graph and comparing results with "Balance + max Sharpe Ratio" criterion

Optimizing a strategy using balance graph and comparing results with "Balance + max Sharpe Ratio" criterion

In this article, we consider yet another custom trading strategy optimization criterion based on the balance graph analysis. The linear regression is calculated using the function from the ALGLIB library.
Practical evaluation of the adaptive market following method
Practical evaluation of the adaptive market following method

Practical evaluation of the adaptive market following method

The main difference of the trading system proposed in the article is the use of mathematical tools for analyzing stock quotes. The system applies digital filtering and spectral estimation of discrete time series. The theoretical aspects of the strategy are described and a test Expert Advisor is created.
Implementing a Scalping Market Depth Using the CGraphic Library
Implementing a Scalping Market Depth Using the CGraphic Library

Implementing a Scalping Market Depth Using the CGraphic Library

In this article, we will create the basic functionality of a scalping Market Depth tool. Also, we will develop a tick chart based on the CGraphic library and integrate it with the order book. Using the described Market Depth, it will be possible to create a powerful assistant tool for short-term trading.
Auto search for divergences and convergences
Auto search for divergences and convergences

Auto search for divergences and convergences

The article considers all kinds of divergence: simple, hidden, extended, triple, quadruple, convergence, as well as divergences of A, B and C classes. A universal indicator for their search and display on the chart is developed.
Cross-Platform Expert Advisor: The CExpertAdvisor and CExpertAdvisors Classes
Cross-Platform Expert Advisor: The CExpertAdvisor and CExpertAdvisors Classes

Cross-Platform Expert Advisor: The CExpertAdvisor and CExpertAdvisors Classes

This article deals primarily with the classes CExpertAdvisor and CExpertAdvisors, which serve as the container for all the other components described in this article-series regarding cross-platform expert advisors.
Universal Expert Advisor: CUnIndicator and Use of Pending Orders (Part 9)
Universal Expert Advisor: CUnIndicator and Use of Pending Orders (Part 9)

Universal Expert Advisor: CUnIndicator and Use of Pending Orders (Part 9)

The article describes the work with indicators through the universal CUnIndicator class. In addition, new methods of working with pending orders are considered. Please note: from this point on, the structure of the CStrategy project has undergone substantial changes. Now all its files are located in a single directory for the convenience of users.
Graphical Interfaces XI: Integrating the Standard Graphics Library (build 16)
Graphical Interfaces XI: Integrating the Standard Graphics Library (build 16)

Graphical Interfaces XI: Integrating the Standard Graphics Library (build 16)

A new version of the graphics library for creating scientific charts (the CGraphic class) has been presented recently. This update of the developed library for creating graphical interfaces will introduce a version with a new control for creating charts. Now it is even easier to visualize data of different types.
Risk Evaluation in the Sequence of Deals with One Asset
Risk Evaluation in the Sequence of Deals with One Asset

Risk Evaluation in the Sequence of Deals with One Asset

This article describes the use of methods of the theory of probability and mathematical statistics in the analysis of trading systems.
TradeObjects: Automation of trading based on MetaTrader graphical objects
TradeObjects: Automation of trading based on MetaTrader graphical objects

TradeObjects: Automation of trading based on MetaTrader graphical objects

The article deals with a simple approach to creating an automated trading system based on the chart linear markup and offers a ready-made Expert Advisor using the standard properties of the MetaTrader 4 and 5 objects and supporting the main trading operations.
Deep Neural Networks (Part IV). Creating, training and testing a model of neural network
Deep Neural Networks (Part IV). Creating, training and testing a model of neural network

Deep Neural Networks (Part IV). Creating, training and testing a model of neural network

This article considers new capabilities of the darch package (v.0.12.0). It contains a description of training of a deep neural networks with different data types, different structure and training sequence. Training results are included.