Hire experienced MT4 programmers for custom Expert Advisors, indicators, and trading scripts. At barmenteros FX, we have been developing production MQL4 and MQL5 code since 2011 — over 200 projects delivered for traders and firms worldwide, from simple alert scripts to multi-pair portfolio EAs.
What You Get
- Fully compiled `.ex4` / `.ex5` file ready for MetaTrader deployment
- Complete MQL4 or MQL5 source code (you own it)
- Strategy Tester validation — backtest results before delivery
- Post-delivery support and bug fixes included
- Detailed documentation of inputs, parameters, and usage
How It Works
- Submit Your Strategy: Describe your trading idea or send an existing specification. The more detail, the more accurate the quote. Not sure how to write a spec? Read our guide on how to write an EA specification that saves you money.
- Receive a Fixed-Price Quote: We review your requirements and send a detailed quote within 48 hours — no hourly rates, no surprises.
- Development & Testing: We build, test in the Strategy Tester, and refine. You receive progress updates and can review interim results.
- Delivery & Support: You receive the compiled file, source code, and documentation. Post-delivery support covers any bugs or adjustments.
What Does an MT4 Programmer Do?
An MT4 programmer — also called an MQL coder, MQL4 developer, or MetaTrader programmer — specializes in building automated trading tools for the MetaTrader platform using the MQL4 and MQL5 programming languages.
The most common projects we handle:
- Expert Advisors (EAs): Fully automated trading robots that execute your strategy without manual intervention. This is our core service — learn more about our EA development process.
- Custom Indicators: Visual analysis tools that overlay calculations on your charts, from simple moving average overlays to complex multi-timeframe dashboards.
- Scripts: One-time execution tools for batch operations — closing all orders, calculating position sizes, or exporting trade history.
- Alerters: Notification systems that monitor conditions and send alerts to your phone, email, or Telegram.
Download our free Regression Analysis Indicator for MT4 to see the kind of work we deliver.
MQL4 vs MQL5 — Which Should You Use?
MQL4 and MQL5 are the proprietary languages for MetaTrader 4 and MetaTrader 5 respectively. At barmenteros FX, we have been writing production code in both since 2011. Here is the honest assessment:
- Still on MT4? MQL4 is your only option, and it handles the vast majority of Expert Advisor requirements without compromise. After 15+ years of deployment, the edge cases are well-documented and the platform is extraordinarily stable.
- On MT5 with forex only? MQL5 works, but the added complexity rarely pays off unless you need multi-asset execution or portfolio backtesting.
- On MT5 with stocks, futures, or complex order flow? MQL5 is the right choice — the extra features justify the extra development time.
- Migrating from MT4 to MT5? Code does not port automatically. MQL4 and MQL5 are not backward compatible. A migration requires a proper rewrite — we handle these conversions regularly. Read about what actually changes in an MT4 to MT5 migration.
One practical point we see developers overlook: MQL4 underwent a major structural update at Build 600, which broke compatibility with pre-2014 code. If you have older EAs that behave unexpectedly on a current MT4 build, a Build 600 migration review is often the first diagnostic step.
Who This Is For
Good fit:
- Traders with a defined strategy and budget ($200+) ready for professional implementation
- Firms needing reliable, production-grade trading automation
- Traders who have been burned by cheap or AI-generated solutions that failed in live markets
- Anyone needing MT4 to MT5 migration done properly
Not the best fit:
- Traders with no clear strategy expecting us to “just make something profitable” — we implement your logic, not ours
- Budgets under $150 — the minimum viable scope for a production-quality deliverable starts at $150 for indicators and $200 for EAs
- “Copy this EA” requests without source code or specification — we build from specs, not from compiled files
What Makes This Different
Most MQL development shops are freelancers who learned to code last year. We have been building trading systems exclusively since 2011 — that means we have seen every edge case that makes EAs fail in production.
Broker disconnections during open trades. Requote loops that freeze execution. Floating-point precision errors that silently corrupt position sizing. State loss on terminal restart that turns a winning strategy into an uncontrolled position. We have diagnosed and fixed every one of these in client projects.
We also understand trading, not just coding. When a client describes a strategy, we ask the questions a developer-trader asks: “What happens during a gap? How does this behave on NFP? What if the spread widens to 30 pips?” These are the scenarios that separate an EA that passes a backtest from one that survives live markets.
Every project includes source code ownership, Strategy Tester validation, and post-delivery support. We work on fixed prices — no hourly billing, no scope surprises.
Pricing
Simple single-strategy EAs start at $200. Standard projects with multiple instruments, advanced risk management, or crash-resilient state persistence typically range from $400–$2,500 depending on scope.
Custom indicators start at $150. Platform conversions (MT4 → MT5) start at $300.
Every quote is fixed-price and includes source code, compiled files, documentation, and post-delivery support.
Frequently Asked Questions
How much does it cost to hire an MT4 programmer?
At barmenteros FX, custom EA development starts at $200 for simple single-strategy robots. Standard projects with multiple instruments or advanced risk management range from $400–$2,500. Custom indicators start at $150. Every quote is fixed-price — no hourly rates. We provide a detailed quote within 48 hours of receiving your specification, so you know the exact cost before committing.
How long does it take to develop a custom Expert Advisor?
A simple single-strategy EA typically takes 1–2 weeks from specification to delivery. Standard projects with multiple instruments, complex entry/exit logic, or crash-resilient state management take 2–4 weeks. Complex multi-pair portfolio EAs can take 4–8 weeks. Timeline depends primarily on specification clarity — a well-written spec with defined entry rules, exit rules, and risk parameters accelerates delivery significantly.
Can you convert my MT4 EA to MT5?
Yes. MT4 to MT5 migration is one of our core services (from $300). MQL4 and MQL5 are not backward compatible — migration requires rewriting order management, adapting to the MQL5 position model, and restructuring event handlers. We handle the full rewrite, not just recompilation. The compiled MT4 `.ex4` file is not sufficient — we need either MQL4 source code or a detailed specification to build the MT5 version.
What should I include in an EA specification?
A good specification includes: the trading strategy rules (entry conditions, exit conditions, position sizing), the timeframe and instruments, risk management rules (stop loss, take profit, maximum drawdown), and any special requirements (trailing stops, break-even logic, multi-pair correlation). The more specific your spec, the more accurate the quote and the faster the delivery. We wrote a detailed guide: How to Write an EA Specification That Saves You Money.
What is the difference between an MT4 programmer and an EA programmer?
They are the same role under different names. MT4 programmer, EA programmer, MQL4 developer, forex programmer, and MetaTrader programmer all refer to a developer who builds automated trading tools for the MetaTrader platform using the MQL4 or MQL5 programming language. The terminology varies by region and community, but the skill set is identical. At barmenteros FX, our team covers the full range — Expert Advisors, indicators, scripts, and MetaTrader license management solutions.
Related Services
- Expert Advisor Programming — dedicated EA development service page with detailed process breakdown
- Forex Programming Services — broader programming services including multi-platform development
- All MetaTrader Programming Services — full service catalog
- MT4 Programmers Directory — compare MT4 programming service providers
- LicenseShield — MT4/MT5 License Protection — protect and distribute your trading tools commercially