MQL4 ↔ MQL5 conversion, EA fixes and upgrades
Already have an EA that needs work? I port robots between MT4 and MT5, track down bugs, and add the features they are missing: trailing stop, breakeven, news filter, position sizing and drawdown safeguards.
What’s included
- MT4 (MQL4) to MT5 (MQL5) conversion, and MT5 to MT4
- Bug fixing and behaviour review of an existing EA
- Adding trailing stop-loss, breakeven, news filter and session filters
- Adding position sizing and drawdown or equity safeguards
- Re-testing in the Strategy Tester after changes
- Updated compiled file and notes on what changed
Built for
- Traders who bought an EA and want it changed
- Traders moving from MT4 to MT5
- Traders whose robot behaves unexpectedly
How it works
A clear path from idea to delivery.
- 01
Review
You describe the problem or the change; the existing code or behaviour is reviewed.
- 02
Change
The fix, feature or port is implemented in MQL4 or MQL5.
- 03
Re-test
Strategy Tester confirms the behaviour and that nothing else broke.
- 04
Hand over
Updated file with notes on what changed.
FAQ
Questions on mql4 ↔ mql5 conversion & ea fixes.
Can you edit an EA I bought if I only have the .ex4 file?
Compiled files cannot be edited. Changes need the source code (.mq4/.mq5). If you do not have it, the logic can be rebuilt from a description of how the EA behaves.
Does an MT4 EA work on MT5?
Not directly. MQL4 and MQL5 differ, so the EA has to be converted and re-tested.
Can you add a news filter to my EA?
Yes, given the source code. The News Factor EA approach pauses around high- and medium-impact news on the Forex Factory calendar.
Get started
Send your brief. Get a scoped quote.
No code is written until you approve the specification.
Related services
Custom MT4 & MT5 Expert Advisors
Your manual forex strategy turned into a fully automated, risk-managed Expert Advisor, coded in MQL4 or MQL5, back-tested and delivered.
Learn more
Prop firm & funded-account EAs
Expert Advisors built around your prop firm’s published rules: daily loss and max drawdown guards, news filters and disciplined position sizing.
Learn more
Gold (XAUUSD) Expert Advisors
Automation for gold’s fast, volatile moves: spread and slippage controls, news protection and disciplined risk per trade.
Learn more