Fix a broken MT4 expert advisor
Send the EA, the error or behavior, and broker details. Moore Tech diagnoses whether the problem is code, broker settings, or platform behavior.
Learn more →MT4 Programming
Hire an MT4 programmer for expert advisor repairs, indicators, and MQL4 work.
Hire Moore Tech for MetaTrader 4 programming: broken expert advisor repairs, MQL4 indicators, custom EAs, alerts, and MT4-to-MT5 conversions scoped around your broker setup and the behavior you expect on live charts.
Request an MT4 Programmer QuoteNo obligation · Reviewed by a programmer · Scope and price agreed before development
20+years serving traders
2,000+custom software projects delivered
MQL4MT4-specific development and repair
MT4 tools repaired, modernized, or built around your rules and broker.
You do not need a complete specification to start. Tell us what happens, what should happen and the platform you use.
Hire an MT4 developer
Use this path for custom MQL4 indicators, expert advisors, alerts, and trade-management tools quoted at a fixed price.
Learn more →MT4 indicator programming
Custom indicators, alerts, and dashboards built for the way you read MT4 charts.
Learn more →MT4 to MT5 conversion
Decide whether an MQL4 tool should be converted, modernized, or rebuilt for MetaTrader 5.
Learn more →MT5 and full MetaTrader services
For MT5-first work, or when the platform target is still open, start from the full MetaTrader programming page.
Learn more →Pre-build scope review
Clarify whether the fastest path is repair, conversion, rebuild, or a smaller diagnostic.
Learn more →Project experience
See how we approach repair and conversion work.
Read anonymized project accounts, including the original problem, the approach and the delivered outcome.
Read a project account →Start with a free inquiry. If investigation is needed before the work can be estimated, we’ll explain the review scope and price first. Implementation is quoted separately.
“I especially appreciate your ability to put my sometimes unclearly defined ideas into workable code. Having worked with several coders over the years, I found working with you most enjoyable and productive.”
How your project moves forward
01
Describe the goal
Start with the platform and what you want to build or fix. Source files and screenshots can follow when we reply.
02
Agree on the work
We clarify behavior, deliverables, testing, price and support before development.
03
Build, test and review
The implementation is reviewed against the agreed requirements and examples.
Project details, platform considerations and guides
A clear MT4 repair or build scope before code begins.
- Diagnosis or scope document with rules, assumptions, and deliverables
- MQL4 repair or build matched to the agreed workflow
- Testing against the stated behavior before delivery
- Guidance for install, usage, source expectations, and next steps
MT4 work has to account for broker and platform behavior.
Built for MT4 behavior:Repairs and builds are scoped around MT4's order model, symbol settings, tester-versus-live differences, and how EAs behave through disconnects and restarts.
Diagnosis before repair:A broken EA gets a cause, not a guess: code defect, broker constraint, data issue, or platform change — then the cheapest correct fix.
Honest platform advice:When MT4 is the wrong place for the tool to live — because of broker direction or MQL4 limits — Moore Tech says so and scopes the MT5 path instead.
How much does MT4 programming or EA repair cost?
Moore Tech quotes MT4 work after reviewing the MQL4 files, screenshots, broker context, and expected behavior. Many EA repairs fit a small fixed-price diagnostic; custom EAs and conversions get a scoped quote before any build time starts.
Best for fixed quote:Clear rules, MQL4 files, screenshots, broker details, and expected behavior.
Best for diagnostic:Broken EA, compile error, broker-specific issue, or repair-versus-rebuild question.
Usually needs more scope:Custom expert advisors, trade-management tools, and MT4-to-MT5 conversions.
More guidance before you hire an MT4 programmer.
Questions before you start
Can you fix a broken MT4 expert advisor?
Yes. Send the EA file, the error or behavior you are seeing, your broker, and the MT4 build. Moore Tech diagnoses whether the cause is the code, broker settings, symbol behavior, or a platform change, then quotes the cheapest correct fix — repair, cleanup, or rebuild.
The original developer is gone. Can you take over the code?
Yes, if you have the MQL4 source (.mq4). Moore Tech reviews the code, documents what it actually does, and can repair, modernize, or extend it. If you only have the compiled .ex4 file, the options are narrower — usually a rebuild from the rules.
Do you build custom MT4 expert advisors?
Yes. Custom EAs are built from defined entries, exits, sizing, and risk rules, with broker constraints and tester-versus-live behavior scoped up front and a fixed-price quote before development starts.
Should I convert my MT4 tools to MT5?
It depends on your broker's direction and what the tool does. MQL4 and MQL5 are different languages, so conversion is real work — but staying on MT4 has its own risks as brokers migrate. Moore Tech will give a straight recommendation before quoting either path.
Why does my EA behave differently live than in the strategy tester?
Common causes include tick data differences, slippage and spread behavior, broker order rules, and code that assumes tester conditions. This is one of the most frequent MT4 repair requests, and diagnosis starts with comparing the tester assumptions against live broker behavior.
How much does MT4 EA repair cost?
Many repairs start with a small fixed-price diagnostic that identifies the cause and the fix. Larger repairs, custom EAs, and conversions are quoted after Moore Tech reviews the files, screenshots, broker context, and expected behavior.
Tell us what you want to build or fix.
A short description is enough to begin the conversation.
Request an MT4 Programmer Quote