Published article "Category Theory in MQL5 (Part 7): Multi, Relative and Indexed Domains".

Category Theory is a diverse and expanding branch of Mathematics which is only recently getting some coverage in the MQL5 community. These series of articles look to explore and examine some of its concepts & axioms with the overall goal of establishing an open library that provides insight while also hopefully furthering the use of this remarkable field in Traders' strategy development.
The most downloaded free products:
Bestsellers in the Market:
32 new products are now available on the Market:
Published article "How to connect MetaTrader 5 to PostgreSQL".

This article describes four methods for connecting MQL5 code to a Postgres database and provides a step-by-step tutorial for setting up a development environment for one of them, a REST API, using the Windows Subsystem For Linux (WSL). A demo app for the API is provided along with the corresponding MQL5 code to insert data and query the respective tables, as well as a demo Expert Advisor to consume this data.
The most downloaded free products:
Bestsellers in the Market:
24 new products are now available on the Market:
Most downloaded source codes this month
- Cryptos_V1 - MetaTrader 4 Expert for ETH Crypto EA for ETH/USD pair.
- Support and Resistance Indicator This Indicator shows the potential breakout/stop levels.
- Candle Time End and Spread The indicator displays the current spread and the time till closing the bar (candlestick) at the same time.
Most read articles this month

In this article, we demonstrate an easy way to install MetaTrader 5 on popular Linux versions — Ubuntu and Debian. These systems are widely used on server hardware as well as on traders’ personal computers.

How to purchase a trading robot from the MetaTrader Market and to install it?
A product from the MetaTrader Market can be purchased on the MQL5.com website or straight from the MetaTrader 4 and MetaTrader 5 trading platforms. Choose a desired product that suits your trading style, pay for it using your preferred payment method, and activate the product.

How to Test a Trading Robot Before Buying
Buying a trading robot on MQL5 Market has a distinct benefit over all other similar options - an automated system offered can be thoroughly tested directly in the MetaTrader 5 terminal. Before buying, an Expert Advisor can and should be carefully run in all unfavorable modes in the built-in Strategy Tester to get a complete grasp of the system.
The most popular forum topics:
- is this comparison safe for non constant data ? 17 new comments
- Create groups and communicate with fellow traders in the updated Chat 13 new comments
- I purchased an EA but it won't load and says "invalid license". 11 new comments
The most downloaded free products:
Bestsellers in the Market:
26 new products are now available on the Market:
39 new signals now available for subscription:
Growth: | 75.21 | % |
Equity: | 1 737.61 | USD |
Balance: | 1 752.13 | USD |
The most popular forum topics:
- Libraries: MQL Plus Enhanced Debugging Support 38 new comments
- Possible Preprocessor Bug 17 new comments
- MT5 Not working on Windows 11 15 new comments
Most downloaded source codes this week
- Trade Sessions Indicator This indicator is based on DRAW_FILLING buffers. The input parameters are absent, the TimeTradeServer(), TimeGMT() functions are used.
- Candle Time End and Spread The indicator displays the current spread and the time till closing the bar (candlestick) at the same time.
- Auto TP multiplied by SL Th Expert will set the TP based on the SL manually set using the input multiplier. Using this you can set 2,3,4 etc times the SL set.
Most read articles this week

Take a few lessons from Prop Firms (Part 1) — An introduction
In this introductory article, I address a few of the lessons one can take from the challenge rules that proprietary trading firms implement. This is especially relevant for beginners and those who struggle to find their footing in this world of trading. The subsequent article will address the code implementation.

How to purchase a trading robot from the MetaTrader Market and to install it?
A product from the MetaTrader Market can be purchased on the MQL5.com website or straight from the MetaTrader 4 and MetaTrader 5 trading platforms. Choose a desired product that suits your trading style, pay for it using your preferred payment method, and activate the product.

In this article, we demonstrate an easy way to install MetaTrader 5 on popular Linux versions — Ubuntu and Debian. These systems are widely used on server hardware as well as on traders’ personal computers.
Bestsellers in the Market:
20 new products are now available on the Market:
The most downloaded free products:
Bestsellers in the Market:
15 new products are now available on the Market:
New publications in CodeBase
- Equity and Balance as an indicator for MT5 This is a very easy-to-use indicator that displays the changes in Equity and balance of the trading account as it dynamically moves. Particularly useful on the back tester and good for beginners to read this very easy MQL5 code.
- Dynamic Trailing Stop Loss and Profit Target Management This code snippet implements a dynamic risk management strategy for existing trades. It focuses on closing trades based on profit or loss thresholds and employs a trailing stop loss to lock in profits as the trade moves favorably. The strategy helps manage risk and enhance profitability in a streamlined manner.
- Ma Price Cross (Custom Time) Buys when price breaks above the MA and Sells when price breaks below the MA. User can choose the time range (server time) to trade in.
- Strongest Pair Indicator This will return the pair with the most growth in the user input start time and end time
Bestsellers in the Market:
28 new products are now available on the Market:
Published article "Creating an EA that works automatically (Part 11): Automation (III)".

An automated system will not be successful without proper security. However, security will not be ensured without a good understanding of certain things. In this article, we will explore why achieving maximum security in automated systems is such a challenge.
Published article "Population optimization algorithms: Saplings Sowing and Growing up (SSG)".

Saplings Sowing and Growing up (SSG) algorithm is inspired by one of the most resilient organisms on the planet demonstrating outstanding capability for survival in a wide variety of conditions.
The most downloaded free products:
The most popular forum topics:
- Machine Learning and Neural Networks 25 new comments
- OpenCL::Example with Image Blurring Algorithm ,Questions and Issues 19 new comments
- Libraries: MQL Plus Enhanced Debugging Support 18 new comments
20 new products are now available on the Market:
Bestsellers in the Market:
Published article "Creating an EA that works automatically (Part 10): Automation (II)".

Automation means nothing if you cannot control its schedule. No worker can be efficient working 24 hours a day. However, many believe that an automated system should operate 24 hours a day. But it is always good to have means to set a working time range for the EA. In this article, we will consider how to properly set such a time range.