Requests and Raw Ideas

MQL5 Freelance is a specialized service for trading application developers. Traders come here when they need custom-made trading robots, indicators, and other utility apps developed in MQL5/MQL4, Python, C++, and other modern programming languages.

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We have already implemented a lot of interesting things in the previous articles. We have a trading strategy or several trading strategies that we can implement in the EA. Besides, we have developed a structure for connecting many instances of trading strategies in a single EA, added tools for managing the maximum allowable drawdown, looked at possible ways of automated selection of sets of strategy parameters for their best work in a group, learned how to assemble an EA from groups of strategy instances and even from groups of different groups of strategy instances. But the value of the results already obtained will greatly increase if we manage to combine them together.

Let's try to outline a general structure within the article framework: single trading strategies are fed into the input, while the output is a ready-made EA, which uses selected and grouped copies of the original trading strategies that provide the best trading results.

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In the previous article, I have outlined a general plan for developing the EA, which includes several stages. Each stage generates a certain amount of information to be used in the stages that follow. I decided to save this information in a database and created a table in it, in which we can place the results of single passes of the strategy tester for various EAs.

In order to be able to use this information in the next steps, we need to have some way of creating the necessary objects (trading strategies, their groups and EAs) from the information stored in the database. There is no option to save objects directly to the database. The best thing that can be suggested is to convert all the properties of objects into a string, save it in the database, then read this string from the database and create the required object from it.

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CatBoost is an open-source software library with gradient-boosting algorithms on decision trees, it was designed specifically to address the challenges of handling categorical features and data in machine learning.

It was developed by Yandex and was made open-source in the year of 2017, read more.
Despite being introduced recently compared to machine learning techniques such as Linear regression or SVM's, CatBoost gained massive popularity among AI communities and rose to the top of the most used machine learning models on platforms like Kaggle.
What made CatBoost gain this much attention is its ability to automatically handle categorical features in the dataset, which can be challenging to many machine learning algorithms.

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Forecasting time series of future prices is critical in various financial market scenarios. Most of the methods that currently exist are based on certain autocorrelation in the data. In other words, we exploit the presence of correlation between time steps that exists both in the input data and in the predicted values.
Among the models gaining popularity are those based on the Transformer architecture that use Self-Attention mechanisms for dynamic autocorrelation estimation. Also, we see an increasing interest in the use of frequency analysis in forecasting models. The representation of the sequence of input data in the frequency domain helps avoid the complexity of describing autocorrelation and improves the efficiency of various models.

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In this article, we examine the limitations of conventional stepwise feature selection, such as its potential for overfitting and its challenges in capturing interactions between features. We then introduce an enhanced algorithm designed to address these issues, implemented in MQL5, which provides flexible integration with various supervised learning methods.

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