MetaTrader Source Code Library (10,000+ MT4 & MT5 Experts, Indicators & Scripts)

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MetaTrader Source Code Library

Discover one of the largest collections of MetaTrader Expert Advisors, Indicators, Scripts, and Libraries for MT4 and MT5. This library is designed for traders, developers, and algorithmic trading enthusiasts looking for ready-made MQL source code.

All tools are structured for educational use, strategy development, and automation research. You can download, modify, and study each MetaTrader trading system to understand how algorithmic trading strategies are built.

Whether you are working on forex robots, custom indicators, or trading scripts, this resource helps accelerate development and improve your MetaTrader programming skills.

simplified order management class for mt4/mt5 library MT5
MetaTrader 5 library

simplified order management class for mt4/mt5

this class simplifies the process of opening, closing, and modifying trading positions using straightforward commands and configuration.key functions include buy(), sell(), close()...
string array suite library MT4
MetaTrader 4 library

string array suite

description:this suite of functions is designed to manage two-dimensional string arrays, offering a practical solution for prototyping.notes: this is revision 1, building upon the ...
orders suite library MT4
MetaTrader 4 library

orders suite

a comprehensive library of functions designed for efficient order processing of spot currency pairs, spot gold, and spot silver.this suite includes robust error handling mechanisms...
time suite library MT4
MetaTrader 4 library

time suite

a comprehensive library of functions designed for efficient time calculations and report scheduling.this suite offers a range of tools to streamline time-related tasks, ensuring ac...
standard library library MT4
MetaTrader 4 library

standard library

this is a source file for the standard library, providing an example of a library implementation.the library offers a collection of functions and classes to facilitate various task...
calculate lot size based on risk percentage library MT5
MetaTrader 5 library

calculate lot size based on risk percentage

the calculatelot function automatically determines the appropriate trading lot size using risk management principles.traders can specify the percentage of their account balance the...
asq session manager for metatrader 5 library MT5
MetaTrader 5 library

asq session manager for metatrader 5

asq session manager v1.2 is a free and open-source tool that brings institutional-grade session awareness to your eas. it identifies active sessions, kill zones, and asian range br...
session time filter library library MT5
MetaTrader 5 library

session time filter library

this library provides a set of tools to filter trades based on trading sessions, covering major financial centers like london, new york, tokyo, and sydney.it includes predefined se...
asq news filter library MT5
MetaTrader 5 library

asq news filter

asq news filter v1.2 — free, open-source tool to protect your ea from news-driven volatility. this filter integrates with the mql5 calendar api, fetching live economic events and b...
at r-based stop loss manager library MT5
MetaTrader 5 library

at r-based stop loss manager

this is a comprehensive stop loss and trailing stop management class for metatrader 4/5 (mt4/mt5). it provides a set of methods to calculate stop loss levels using various methods ...
asq recovery engine library MT5
MetaTrader 5 library

asq recovery engine

asq recovery engine v1.2 — free, open-sourceyou've just experienced three consecutive trade losses. your next move is crucial: will you lose more or recover?the asq recovery engine...
asq indicator manager library MT5
MetaTrader 5 library

asq indicator manager

stop managing 11 separate indicator handles with boilerplate code. asq indicator manager bundles 11 popular indicators into a single class, offering automatic handle creation, effi...
kelly-va p s risk engine for metatrader library MT5
MetaTrader 5 library

kelly-va p s risk engine for metatrader

the retail risk dilemma: a mathematical perspectivemost algorithmic trading robots fail due to static lot sizing or simplistic risk models. retail developers often calculate risk i...
close all open trades on different symbols library MT5
MetaTrader 5 library

close all open trades on different symbols

tradecloserlib is a powerful mql5 library for automated trading, offering efficient functions to manage open positions.key functions:- closepositions(symbol): - closes all positio...
high-performance json library for llms library MT5
MetaTrader 5 library

high-performance json library for llms

high-performance json (v3.5.0)a json library tailored for llms, autonomous trading, and ultra-low latency.the challengeintegrating ai models (e.g., gpt-4o, claude 3.5, deepseek) in...
memory management for metatrader optimization library MT5
MetaTrader 5 library

memory management for metatrader optimization

during optimization in metatrader's tester, memory shortages can cause crashes.this library helps identify and address such issues by tracking memory consumption dynamics.identifyi...
implementing real-time ticks transfer in mql5 library MT5
MetaTrader 5 library

implementing real-time ticks transfer in mql5

this example demonstrates the process of implementing real-time ticks transfer from the metatrader 5 client terminal to an external server application.the tcp protocol enables data...
mql5 keywords and aliases library MT5
MetaTrader 5 library

mql5 keywords and aliases

this document presents the mql5 keywords and aliases for autoreplace.please note that this list may not be exhaustive, and contributions are welcome to ensure its accuracy and comp...
free fuzzy logic library for metatrader library MT5
MetaTrader 5 library

free fuzzy logic library for metatrader

the fuzzy logic library is a powerful tool for traders, offering a modern approach to solving complex systems that are challenging to program. fuzzy logic closely mimics human logi...
xml parser for metatrader 4/5 library MT5
MetaTrader 5 library

xml parser for metatrader 4/5

the cxmlelement class offers a comprehensive set of functionalities for interacting with xml documents.it facilitates the creation of a dom-model (objects tree) from an xml-documen...
ado suite v 1.0 library MT5
MetaTrader 5 library

ado suite v 1.0

when processing large data sets, using files is inefficient. database management systems (dbms) offer a more effective solution, and several mql4-based tools already exist for inte...
error description library for metatrader 4/5 library MT5
MetaTrader 5 library

error description library for metatrader 4/5

the library provides functions to describe trade server return codes and runtime errors for metatrader 4/5.functions:- tradeserverreturncodedescription: returns a description of tr...
moving averages library for metatrader 5 library MT5
MetaTrader 5 library

moving averages library for metatrader 5

the movingaverages library is an essential component of the standard package in the metatrader 5 client terminal.this library offers a comprehensive set of functions for calculatin...
cgv class for global variables library MT5
MetaTrader 5 library

cgv class for global variables

the cgv class is a powerful tool for managing global variables in the metatrader 5 client terminal.this class provides a set of methods to streamline your workflow:- globalvariable...
calculate lot by percent library MT5
MetaTrader 5 library

calculate lot by percent

module for lot calculation based on risk percentage.this module is designed to automate the calculation of trading position size (lot) to ensure that potential losses when a stop l...
close orders library MT5
MetaTrader 5 library

close orders

close_orders - a versatile function for efficient trade management in metatrader 5.this function simplifies the process of closing positions and deleting pending orders, offering a...
profit and loss positions library MT5
MetaTrader 5 library

profit and loss positions

profit_and_loss_positions - position profit/loss calculatorthis plug-in file calculates the total profit or loss of trading positions with filtering by type and magic number.main f...
modify orders library MT5
MetaTrader 5 library

modify orders

modify_orders.mqh is a powerful tool for managing positions and orders in metatrader 5, offering automation and efficiency for traders.this library provides two essential functions...
ea duplicate detector library MT5
MetaTrader 5 library

ea duplicate detector

allow the ea to identify duplicate eas on the chart according to specified conditions.the expert.mqh file is sourced from a library written in 2026....
cinifile class for windows *.ini files library MT5
MetaTrader 5 library

cinifile class for windows *.ini files

this class simplifies working with windows *.ini files by providing a standard interface with straightforward methods.to use the library:- copy the inifile.mqh file to the mq5\incl...
zeromq asynchronous communication library MT4
MetaTrader 4 library

zeromq asynchronous communication

zeromq is a socket library that acts as a concurrency framework. it carries messages across inproc, ipc, tcp, and multicast and connects n-to-n via fanout, pubsub, pipeline, reques...
optimization report tool library MT5
MetaTrader 5 library

optimization report tool

if you want to optimize your expert advisor using your own characteristics, you can use custom max mode via function. this code simplifies creating your own formulae. to define the...
hash functions library for metatrader 5 library MT5
MetaTrader 5 library

hash functions library for metatrader 5

this library provides general purpose hash functions, including adler32, crc-32, and mahash8v64, all of which are adapted for mql5 unicode strings and have been verified for accura...

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