The new compiler introduced much stronger encryption and structural changes. This means any decompiler that worked on older MT4 builds became entirely useless for modern EX4 files. Because of these updates, the community consensus is that attempting to decompile files compiled in recent years is essentially a dead end. Ethical and Safe Alternatives
Also, I want to mention that without access to the actual GitHub repositories and more detailed information about the used decompilation techniques and algorithms it's hard to provide a thorough analysis and comparison. A deep analysis would also require executing and testing the decompilers on a large set of EX4 files.
themselves; they are command-line wrappers meant to interact with a separate, often paid or hard-to-find Legacy Tools: ex4 to mq4 decompiler github 2021
These methods are extremely technical, time-consuming, and rarely yield a clean, compilable .mq4 file. The discussion on Indo-Investasi concludes with a sobering reality: "From what I have learnt in past few days, there can be no program which can decompile every ex4 file. This process requires a programmer and there is no replacement for that".
The year 2021 was an interesting period for MT4 decompilation. MetaQuotes (the developer of MT4) had been waging a war against decompilers for years, frequently updating the EX4 compiler to make reverse engineering harder. However, GitHub remained a hub for legacy and community-driven decompilation attempts. The new compiler introduced much stronger encryption and
Many trading algorithms rely on years of quantitative research. Decompiling someone else's work to copy their exact entry and exit parameters is widely condemned within the trading community.
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Perfect automated decompilation of modern .ex4 files is mathematically and technically impossible without the original decryption keys or severe exploitation of the platform. What Do GitHub Repositories From 2021 Actually Contain?