# MT4 & MT5 decompilation services

EX4 to MQ4 and EX5 to MQ5 decompilation, source delivery and reference prices. Related repairs, migration and development are available separately.

Canonical: https://mqlfix.top/services/
Language: en
Updated: 2026-11-11

CORE BUSINESS

# MT4 / MT5 decompilation & source recovery.

Choose your platform, share the original file and confirm the source-delivery scope before work begins.

EX4 → MQ4 / EX5 → MQ5

## Choose your decompilation service.

### MT4 decompilation

EX4 → MQ4

Decompilation and MQ4 source recovery for MT4 indicators and EAs. Confirm editable source, dependencies and comparison checks in your quote.

### MT5 decompilation

EX5 → MQ5

Decompilation and MQ5 source-recovery assessment for MT5 indicators and EAs, with an agreed source-delivery and verification scope.

### Send the file. Confirm your quote.

Reference ranges for one indicator or EA source-recovery project. The actual file, version and delivery scope determine the final quote, confirmed before payment.

RELATED SERVICES

## Repairs, migration & development.

### License & expiry issues

Account binding, expiry messages and activation problems: define the issue and the permitted repair.

### MT4 to MT5 conversion

Port MQL4 source to MQL5 and verify the behavior that matters to your workflow.

### Custom EAs & indicators

Turn an explicit trading or display specification into software you can test and maintain.

### Diagnostics & behavior checks

Investigate errors, indicator differences and EA behavior using repeatable evidence.

YOUR NEXT STEP

## Need the source behind your EX4 or EX5?

Tell us your platform, your file and the result you need. We will confirm the scope before you commit.

- [Home](https://mqlfix.top/)
- [Get an MT4 quote ↗](https://mqlfix.top/assessment/?service=ex4-to-mq4)
- [Scope & delivery →](https://mqlfix.top/services/ex4-to-mq4/)
- [Get an MT5 quote ↗](https://mqlfix.top/assessment/?service=ex5-to-mq5)
- [Scope & delivery →](https://mqlfix.top/services/ex5-to-mq5/)
- [03 / REPAIR License & expiry issues Account binding, expiry messages and activation problems: define the issue and the permitted repair. Explore service ↗](https://mqlfix.top/services/license-and-expiry/)
- [04 / MIGRATION MT4 to MT5 conversion Port MQL4 source to MQL5 and verify the behavior that matters to your workflow. Explore service ↗](https://mqlfix.top/services/mt4-to-mt5/)
- [05 / BUILD Custom EAs & indicators Turn an explicit trading or display specification into software you can test and maintain. Explore service ↗](https://mqlfix.top/services/custom-development/)
- [06 / VERIFY Diagnostics & behavior checks Investigate errors, indicator differences and EA behavior using repeatable evidence. Explore service ↗](https://mqlfix.top/services/diagnostics-testing/)
- [Request a free assessment →](https://mqlfix.top/assessment/)