MQL4 Programming Articles
Here you can find articles on MQL4 - programming language of trading strategies.
Most of them are written by traders and active members of MQL5.community. For more convenience, all articles are grouped into several categories - Experts, Indicators, Trading Systems, etc.
Watch out for new articles and discuss them on the Forum!
False trigger protection for Trading Robot
Profitability of trading systems is defined not only by logic and precision of analyzing the financial instrument dynamics, but also by the quality of the performance algorithm of this logic. False...
Using text files for storing input parameters of Expert Advisors, indicators and scripts
The article describes the application of text files for storing dynamic objects, arrays and other variables used as properties of Expert Advisors, indicators and scripts. The files serve as a...
How to create an indicator of non-standard charts for MetaTrader Market
Through offline charts, programming in MQL4, and reasonable willingness, you can get a variety of chart types: "Point & Figure", "Renko", "Kagi", "Range bars", equivolume charts, etc. In this article,...
Evaluating the effectiveness of trading systems by analyzing their components
This article explores the effectiveness of complex trading systems by analyzing the efficiency of its individual components. Any analysis, whether it is graphic, based on indicators, or any other, is...
Applying fuzzy logic in trading by means of MQL4
The article deals with examples of applying fuzzy set theory in trading by means of MQL4. The use of FuzzyNet library for MQL4 in the development of an indicator and an Expert Advisor is described as...
Deep neural network with Stacked RBM. Self-training, self-control
This article is a continuation of previous articles on deep neural network and predictor selection. Here we will cover features of a neural network initiated by Stacked RBM, and its implementation in...
Enhancing the StrategyTester to Optimize Indicators Solely on the Example of Flat and Trend Markets
It is essential to detect whether a market is flat or not for many strategies. Using the well known ADX we demonstrate how we can use the Strategy Tester not only to optimize this indicator for our...
Thomas DeMark's contribution to technical analysis
The article details TD points and TD lines discovered by Thomas DeMark. Their practical implementation is revealed. In addition to that, a process of writing three indicators and two Expert Advisors...
Fuzzy logic to create manual trading strategies
This article suggests the ways of improving manual trading strategy by applying fuzzy set theory. As an example we have provided a step-by-step description of the strategy search and the selection of...
Price Action. Automating the Engulfing Pattern Trading Strategy
This article describes a process of creating an Expert Advisor for MetaTrader 4 based on the Engulfing pattern, as well as the pattern recognition principle, rules of setting pending orders and stop...
How to Develop a Profitable Trading Strategy
This article provides an answer to the question: "Is it possible to formulate an automated trading strategy based on history data with neural networks?".
Price Action. Automating the Inside Bar Trading Strategy
The article describes the development of a MetaTrader 4 Expert Advisor based on the Inside Bar strategy, including Inside Bar detection principles, as well as pending and stop order setting rules....
Managing the MetaTrader Terminal via DLL
The article deals with managing MetaTrader user interface elements via an auxiliary DLL library using the example of changing push notification delivery settings. The library source code and the...
Statistical Verification of the Labouchere Money Management System
In this article, we test the statistical properties of the Labouchere money management system. It is considered to be a less aggressive kind of Martingale, since bets are not doubled, but are raised...
Identifying Trade Setups by Support, Resistance and Price Action
This article shows how price action and the monitoring of support and resistance levels can be used for well-timed market entry. It discusses a trading system that effectively combines the two for the...
Trading Ideas Based on Prices' Direction and Movement Speed
The article provides a review of an idea based on the analysis of prices' movement direction and their speed. We have performed its formalization in the MQL4 language presented as an expert advisor to...
How we developed the MetaTrader Signals service and Social Trading
We continue to enhance the Signals service, improve the mechanisms, add new functions and fix flaws. The MetaTrader Signals Service of 2012 and the current MetaTrader Signals Service are like two...
Why Is It Important to Update MetaTrader 4 to the Latest Build by August 1?
From August 1, 2014, MetaTrader 4 desktop terminals older than build 600 will no longer be supported. However, many traders still work with outdated versions and are unaware of the updated platform's...
Common Errors in MQL4 Programs and How to Avoid Them
To avoid critical completion of programs, the previous version compiler handled many errors in the runtime environment. For example, division by zero or array out of range are critical errors and...
Upgrade to MetaTrader 4 Build 600 and Higher
The new version of the MetaTrader 4 terminal features the updated structure of user data storage. In earlier versions all programs, templates, profiles etc. were stored directly in terminal...
Data Structure in MetaTrader 4 Build 600 and Higher
MetaTarder 4 build 600 features the new structure and location of the client terminal files. Now, MQL4 applications are placed in separate directories according to the program type (Expert Advisors,...
Offline Charts in the New MQL4
Updated MQL4 has the new format for storing historical data and provides the appropriate MqlRates structure for convenient storage of Time, Open, Low, High, Close and Volume values. For many years,...
Testing and Optimization of Expert Advisors
The article provides a detailed description of the process of testing and optimizing Expert Advisors in the MetaTrader 4 Strategy Tester. The importance of such information and the need for this...
Lite_EXPERT2.mqh: Expert Advisor Implementation Examples
In this article, the author continues to familiarize the readers with the Lite_EXPERT2.mqh functions using real Expert Advisor implementation examples. The article deals with the idea of using...
Advanced Analysis of a Trading Account
The article deals with the automatic system for analyzing any trading account in MetaTrader 4 terminal. Technical aspects of a generated report and interpretation of the obtained results are...
Visual Optimization of Indicator and Signal Profitability
This article is a continuation and development of my previous article "Visual Testing of Profitability of Indicators and Alerts". Having added some interactivity to the parameter changing process and...
Lite_EXPERT2.mqh: Functional Kit for Developers of Expert Advisors
This article continues the series of articles "Expert Advisors Based on Popular Trading Systems and Alchemy of Trading Robot Optimization". It familiarizes the readers with a more universal function...
EA Status SMS Notifications
Developing a system of SMS notifications that informs you of the status of your EA so that you are always aware of any critical situation, wherever you may be.
Expert Advisor for Trading in the Channel
The Expert Advisor plots the channel lines. The upper and lower channel lines act as support and resistance levels. The Expert Advisor marks datum points, provides sound notification every time the...
Simple Methods of Forecasting Directions of the Japanese Candlesticks
Knowing the direction of the price movement is sufficient for getting positive results from trading operations. Some information on the possible direction of the price can be obtained from the...
How Reliable is Night Trading?
The article covers the peculiarities of night flat trading on cross currency pairs. It explains where you can expect profits and why great losses are not unlikely. The article also features an example...
Money Management Revisited
The article deals with some issues arising when traders apply various money management systems to Forex trading. Experimental data obtained from performing trading deals using different money...
Alert and Comment for External Indicators (Part Two)
Since I published the article "Alert and Comment for External Indicators", I have been receiving requests and questions regarding the possibility of developing an external informer operating based on...
Alert and Comment for External Indicators. Multi-Currency Analysis Through External Scanning
Alert for multi-currency and multiple time frame analysis of external indicators. The article deals with a method of getting event information in respect of events in external indicators, without...
Graphical Control of External Parameters of Indicators
External variables of indicators are controlled using a special window where parameters can be changed and the indicator is then run again. The obvious inconvenience of these manipulations has given...
Testing Expert Advisors on Non-Standard Time Frames
It's not just simple; it's super simple. Testing Expert Advisors on non-standard time frames is possible! All we need to do is to replace standard time frame data with non-standard time frame data....
Reading RSS News Feeds by Means of MQL4
This article deals with an example of reading RSS markup by means of MQL4 using the functions for HTML tags analysis. We will try to make a work piece which can then be turned into a news indicator or...
LibMatrix: Library of Matrix Algebra (Part One)
The author familiarizes the readers with a simple library of matrix algebra and provides descriptions and peculiarities of the main functions.
Mechanical Trading System "Chuvashov's Triangle"
Let me offer you an overview and the program code of the mechanical trading system based on ideas of Stanislav Chuvashov. Triangle's construction is based on the intersection of two trend lines built...
Three Aspects of Manual Trading Automation. Part 1: Trading
This article is the first in a series of articles on manual trading automation in the МetaТrader 4 trading platform. Each of the articles will be devoted to one of the following aspects: automation of...