While the process of "decompiling" exists, its effectiveness depends entirely on when the file was created:
Converting for free is widely sought after by traders who need to edit Expert Advisors (EAs) or indicators, but it is technically impossible to achieve a perfect 1:1 conversion for files created with modern versions of MetaTrader 4. EX4 files are compiled executables—meaning the human-readable source code (MQ4) has been optimized, stripped of comments, and turned into machine instructions that cannot be easily reversed. Current State of Conversion
If your goal is to extract values from an indicator without modifying its core logic, you do not need to convert the file.
: Less than 5% for modern EX4 files. Most will fail to decompile entirely or crash MT4.
