This is perhaps the most famous open-source decompiler. It supports EX4 builds 600–1350 (covering MT4 builds from 2014 to 2024). The tool works by:
While GitHub is the world’s largest repository for code, finding a working, "push-button" EX4 to MQ4 decompiler there is trickier than it looks. Here is everything you need to know about the current state of EX4 decompilation on GitHub and the risks involved. The Reality of EX4 Decompilation
The legality and ethics of decompiling EX4 files are subjects of ongoing debate, but the general consensus within the trading community is clear.
Machine-readable bytecode executed by the MT4 platform.
: A public repository that has appeared in searches, though its actual efficacy for modern builds is widely questioned by the community. mentebinaria/retoolkit : While not specific to EX4, this is a popular Reverse Engineer's Toolkit
The Forex industry is a prime target for cybercriminals. Fake decompiler repositories often bundle malicious software inside their downloads. Running these tools can infect your computer with: that steal your brokerage login credentials. Keyloggers that capture your passwords and personal data. Ransomware that locks your entire operating system. Account Wiping
: Do not store live broker account credentials on any machine used to test experimental development software.
Before diving into the tools, it's essential to understand the target. An EX4 file is the compiled output of an MQL4 source code (MQ4), created using MetaEditor within the MetaTrader 4 (MT4) platform. It's not native machine code but bytecode for a virtual machine. When you compile MQL4 code, it is translated into this bytecode format specific to the MQL4 Virtual Machine that runs within the MT4 terminal. This compiled format is designed to protect the original source code and intellectual property of trading strategies and indicators.
Decompilation attempts to reverse this compilation process. While older versions of MT4 (before build 600) used simple encryption that made decompilation trivial, modern MT4 builds utilize advanced encryption, obfuscation, and strict compression algorithms. The Reality of EX4 Decompilers on GitHub
...is and can lead to civil lawsuits. Several EA vendors have successfully sued decompilers using DMCA takedowns and international arbitration.
Several Chinese platforms, such as GitCode and CSDN, host what appear to be actual EX4 decompilation tools. One such repository claims to provide “an EX4‑to‑MQ4 decompilation tool that supports MT4 EA file parsing,” describing the core technology as parsing the binary structure of EX4 files and converting it into human‑readable MQL4 source code. While these tools may include a download link, they are typically rather than open‑source code, and they are often sourced from various forums rather than being authored and maintained by the repository owner.
The search for “ex4 decompiler github” reveals a landscape of incomplete tools, misleading repositories, and outright scams. The most important takeaway for any MT4 user is that . The security measures implemented by MetaQuotes have made the format effectively impenetrable.
If you want to explore safe ways to recreate your trading tools, let me know: Do you own the of the EA? What specific feature are you trying to change or fix?