Technically, . Practically, it is extremely difficult and expensive.
However, in , MetaQuotes released a massive update (Build 600 and later) that fundamentally changed how EX4 files were structured. The new format introduced: ex4 decompiler
If you find yourself needing to understand a strategy but don't have the source code, consider these safer paths: Technically,
With the release of , MetaQuotes fundamentally changed the architecture of the EX4 file. ex4 decompiler