Chao Lei / Profile
![Chao Lei](https://c.mql5.com/avatar/2022/3/6224235B-60D7.jpg)
![Using Self-Organizing Feature Maps (Kohonen Maps) in MetaTrader 5](https://c.mql5.com/2/0/Self_organizing_maps_in_MQL5.png)
One of the most interesting aspects of Self-Organizing Feature Maps (Kohonen maps) is that they learn to classify data without supervision. In its basic form it produces a similarity map of input data (clustering). The SOM maps can be used for classification and visualizing of high-dimensional data. In this article we will consider several simple applications of Kohonen maps.
![Chao Lei](https://c.mql5.com/avatar/2022/3/6224235B-60D7.jpg)
![Programming a Deep Neural Network from Scratch using MQL Language](https://c.mql5.com/2/43/mql5-neural-network-from-scratch.png)
This article aims to teach the reader how to make a Deep Neural Network from scratch using the MQL4/5 language.
![Chao Lei](https://c.mql5.com/avatar/2022/3/6224235B-60D7.jpg)
![The Simple Example of Creating an Indicator Using Fuzzy Logic](https://c.mql5.com/2/0/Fuzzy_logic_MQL5.png)
The article is devoted to the practical application of the fuzzy logic concept for financial markets analysis. We propose the example of the indicator generating signals based on two fuzzy rules based on Envelopes indicator. The developed indicator uses several indicator buffers: 7 buffers for calculations, 5 buffers for the charts display and 2 color buffers.