You can often identify decompiled code by several telltale signs:
Wait 5–30 seconds depending on EA complexity.
You developed an EA years ago, lost your hard drive, and only have the EX4 running on a live terminal. Decompiling gives you back editable source code.
Where the decompiled MQ4 will be saved.
: Even the best decompiler cannot perfectly recover original comments, formatting, local variable names, or certain compiler optimizations. The output is often "functional but messy."
To understand why specific decompiler versions are heavily searched, it helps to look at the history of the MetaTrader 4 platform architecture. Pre-Build 600 Era