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Convert EX4 to EX5

Can you convert EX4 to EX5?
Verified by Adam B.· reviewed by FE Editorial ·updated Aug 4, 2026
QUICK ANSWER
Is it possible to convert EX4 to EX5?
No - not a direct conversion.

There is no EX4-to-EX5 converter. If you own the MQL4 source (.mq4 file), a developer can rewrite the logic in MQL5 and compile it to .ex5; without the source, contact the original developer or find a native MT5 version.

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Last verified Oct 2026

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Why convert EX4 to EX5?

EX4 is compiled MQL4 bytecode for the MetaTrader 4 terminal, and EX5 is compiled MQL5 bytecode for MetaTrader 5. The two platforms use different languages, different virtual machines, and different binary formats. Converting would require decompiling EX4 - which MetaQuotes protected against since MT4 build 600 in 2014 - then manually rewriting the logic in MQL5, which is a developer task, not a file conversion.

How to convert EX4 to EX5

MetaEditor 5 FREE

Open MetaEditor 5, rewrite the .mq4 source logic in MQL5, and compile it to an .ex5 file. This is manual developer work and requires the original MQL4 source - it is not an automated conversion.

About these formats

.EX4 MetaTrader 4 Compiled Program (Expert Advisor / Indicator / Script)

An EX4 file is a compiled MQL4 program for the MetaTrader 4 trading platform -- an Expert Advisor (trading robot), a custom indicator, or a script. You install it by copying it into the…

Open .EX4 details →
.EX5 MetaTrader program

A .EX5 file is associated with MetaTrader program, a misc file.

Open .EX5 details →

Quality & what to watch

  • No decompiler can reliably reverse a modern .ex4 file - MetaQuotes added obfuscation in MT4 build 600 (February 2014) specifically to prevent automated decompilation.
  • MQL4 and MQL5 differ in syntax, function libraries, and object model; porting requires a developer, not just a tool.
  • MT4 and MT5 can run on the same machine - running the .ex4 in MT4 alongside MT5 is a valid alternative to porting.

Frequently asked questions

Is there any software that converts EX4 to EX5?
No. The technical barrier - decompilation of obfuscated bytecode plus cross-language porting to MQL5 - cannot be automated, and no legitimate tool does this.
Can I run an EX4 file inside MetaTrader 5?
No. .ex4 runs only in MT4 and .ex5 runs only in MT5; they are not cross-compatible.
What if I only have the EX4 file and no source code?
Contact the original developer and ask for either a native MT5 version or the MQL4 source; without source code, the strategy cannot be ported.