MQL4 and MQL5 Programming Articles

Since the first Automated Trading Championship we have seen plenty of trading robots in our TOP-10 created with the use of various methods. Excellent results were shown both by the Exper Advisors based on standard indicators, and complicated analytical complexes with weekly automatic optimization of their own parameters.

Antonio Morillas from Spain (sallirom, by the way - it is reversed surname!) was first who doubled his starting balance from the beginning of the Championship and thus attracted our attention. His trading strategy is extremely risky. We decided to talk to Antonio about risk and luck as these are part and parcel of Automated Trading Championship.

The multilayer perceptron is an evolution of the simple perceptron which can solve non-linear separable problems. Together with the backpropagation algorithm, this neural network can be effectively trained. In Part 3 of the Multilayer Perceptron and Backpropagation series, we'll see how to integrate this technique into the Strategy Tester. This integration will allow the use of complex data analysis aimed at making better decisions to optimize your trading strategies. In this article, we will discuss the advantages and problems of this technique.

It was only this summer that Vitaly Antonov (beast) has learned about the upcoming Automated Trading Championship and got to know MetaTrader 5 terminal. Time was running out, besides, Vitaly was a newcomer. So, he randomly chose GBPUSD currency pair to develop his trading system. And the choice turned out to be successful. It would have been impossible to use other symbols with the strategy.

This material provides a complete guide to creating a class in MQL5 for efficient management of CSV files. We will see the implementation of methods for opening, writing, reading, and transforming data. We will also consider how to use them to store and access information. In addition, we will discuss the limitations and the most important aspects of using such a class. This article ca be a valuable resource for those who want to learn how to process CSV files in MQL5.

In this article, we will create a random forest model in Python, train the model, and save it as an ONNX pipeline with data preprocessing. After that we will use the model in the MetaTrader 5 terminal.

In this article we will talk about how MQL5 can interact with Python and FastAPI, using HTTP calls in MQL5 to interact with the tic-tac-toe game in Python. The article discusses the creation of an API using FastAPI for this integration and provides a test script in MQL5, highlighting the versatility of MQL5, the simplicity of Python, and the effectiveness of FastAPI in connecting different technologies to create innovative solutions.

This is the first interview in the "ATC Champions League" project. Roman Zamozhniy (Rich) from Ukraine was the winner of the first Automated Trading Championship in 2006. In addition, he is a regular participant of our Championships - he has not missed a single contest. In this interview, we talked about Roman's first place and tried to figure out what is necessary for successful participation.

In this article, I will develop display styles and description text for the progress bar of the ProgressBar control.

Interview with Olexandr Topchylo (Better) is the second publication within the "ATC Champions League" project. Having won the Automated Trading Championship 2007, this professional trader caught the attention of investors. Olexandr says that his first place in the ATC 2007 is one of the major events of his trading experience. However, later on this popularity helped him discover the biggest disappointment - it is so easy to lose investors after the first drawdown on an investor account.

In the current article, I will implement the ability to change the properties and appearance of the newly created SplitContainer control.

Ukrainian programmer Andrei Moraru (enivid) is an active participant of the Automated Trading Championship beginning from 2007. Andrei had already come in our view at that time and now we have decided to find out if there occured any changes in his attitude towards trading and selection of trading strategies for the past four years, and also to know about his new Expert Advisor.

This article reports the first attempts in the development of a native MQTT client for MQL5. MQTT is a Client Server publish/subscribe messaging transport protocol. It is lightweight, open, simple, and designed to be easy to implement. These characteristics make it ideal for use in many situations.

In this article, we expand the range of tasks of our agent. The training process will include some aspects of money and risk management, which are an integral part of any trading strategy.

It is sometimes necessary to perform identical operations with a group of files. If you have a list of files included into a group, then it is no problem. However, if you need to make this list yourself, then a question arises: "How can I do this?" The article proposes doing this using functions FindFirstFile() and FindNextFile() included in kernel32.dll.

In this article, I will continue the development of TabControl and implement the arrangement of tab headers on all four sides of the control for all modes of setting the size of headers: Normal, Fixed and Fill To Right.

Among the dozens of examples of how to work with charts, there is a method of manual marking a template. Trend lines, channels, support/resistance levels, etc. are imposed in a chart. Surely, there are some special programs for this kind of work. Everyone decides on his/her own which method to use. In this article, I offer you for your consideration the methods of manual marking with subsequent automating some elements of the repeated routine actions.

Of all the things that we have developed so far, this system, as you will probably notice and eventually agree, is the most complex. Now we need to do something very simple: make our system simulate the operation of a trading server. This need to accurately implement the way the trading server operates seems like a no-brainer. At least in words. But we need to do this so that the everything is seamless and transparent for the user of the replay/simulation system.

In this article, I will continue the development of the ProgressBar control. In particular, I will create the functionality for managing the progress bar and visual effects.

In the second week of the competition, the Expert Advisor of Sergey Nikitin (VNIK) trading on two currency pairs EURUSD and EURJPY got featured on the very top drawing away from the rest. Multicurrency Expert Advisors always attract attention in the Championship, especially those that show good results. We talked with Sergey about the role of luck in a trader's life and his way of trading.

The article considers the grid trading approach based on stop pending orders and implemented in an MQL5 Expert Advisor on the Moscow Exchange (MOEX). When trading in the market, one of the simplest strategies is a grid of orders designed to "catch" the market price.

Bulit-in OpenCL support in MetaTrader 5 still has a major problem especially the one about device selection error 5114 resulting from unable to create an OpenCL context using CL_USE_GPU_ONLY, or CL_USE_GPU_DOUBLE_ONLY although it properly detects GPU. It works fine with directly using of ordinal number of GPU device we found in Journal tab, but that's still considered a bug, and users should not hard-code a device. We will solve it by recreating an OpenCL support as DLL with C++ on Linux. Along the journey, we will get to know OpenCL from concept to best practices in its API usage just enough for us to put into great use later when we deal with DLL implementation in C++ and consume it with MQL5.

While manual trading you have to keep an eye on the values of several indicators. It is a little bit different from mechanical trading. If you have two or three indicators and you have chosen a one timeframe for trading, it is not a complicated task. But what will you do if you have five or six indicators and your trading strategy requires considering the signals on the several timeframes?

On the second day of the Championship the Expert Advisor created by Matúš German (gery18) increased its capital by 2.5 times and took the lead being ahead of all competitors. Matúš himself doubts his Expert Advisor will win, he thinks that luck and high risk were the reasons of such unexpected rise.

The Expert Advisor of Ilnur Khasanov (aharata) is holding its place in our TOP-10 chart of the Automated Trading Championship 2011 participants from the third week already, though Ilnur's acquaintance with Forex has started only a year ago. The idea that forms the basis of the Expert Advisor is simple but the trading robot contains self-optimization elements. Perhaps, that is the key to its survival? Besides, the author had to change the Expert Advisor planned to be submitted for the Championship...

In order to use the data that forms the bars, we must abandon replay and start developing a simulator. We will use 1 minute bars because they offer the least amount of difficulty.