If you cannot find a working decompiler for your EX4 file's build version, you might consider hiring a professional service. Platforms like the official MQL5 marketplace allow you to post a job offering to convert your EX4 file to MQ4 source code. These jobs typically have budgets ranging from and professionals claim they can complete the work within a day.
First, back up your original .EX4 file. Find your MT4 data folder (usually %appdata%\MetaQuotes\Terminal\[instance-ID]\MQL4\ ). Compile a simple, known EA yourself and practice decompiling it to understand the process.
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If a functional converter is unavailable, advanced developers turn to hex editors or disassembly engines to pull static data strings from the binary file.
These tools are specifically designed to reverse-engineer EX4 files.
