Completed MQL5 work
Experience across Expert Advisors, indicators, integrations, conversions, repairs and research tools.
Custom development · MQL5 · MetaTrader 5
Custom MQL5 Expert Advisor Development
Turn a defined trading idea into an MT5 system with explicit rules, controlled execution, testable risk logic and a documented hand-off.
Market journey
System design is informed by live-market constraints—not code alone.
Dubai-based research
Ongoing work in strategy design, capital management and evidence-led evaluation.
Direct answers
The service at a glance
- What it is
- A scoped engineering service that turns defined trading rules into a reviewable MT5 Expert Advisor, indicator, risk module, conversion or repair.
- Who it is for
- Traders and teams with a clear hypothesis who need deterministic MQL5 implementation, testing and documented hand-off.
- What to provide
- Strategy rules, platform and symbol scope, timeframe, entry and exit logic, risk limits, broker constraints and any existing test material.
- What is delivered
- The agreed code or build files, parameter notes, test evidence and hand-off documentation defined in the project scope.
- Cost and timeline
- Quoted after the specification is reviewed. Rule clarity, integrations, symbol coverage, test depth and hand-off requirements are the main effort drivers.
- Experience base
- The public experience base covers 170 completed MQL5 projects across Expert Advisors, indicators, integrations, conversions, repairs and research tools, informed by a 12-year market journey.
The engineering problem
A trading idea is not yet a specification.
Most failed automation projects do not begin with a syntax error. They begin with an undefined decision: which bar is confirmed, how a signal expires, what happens after a restart, how broker digits affect a level, or which position the risk manager is allowed to touch. POLARIS starts by converting those ambiguities into rules that can be tested.
Deterministic logic
Entry, exit, timing and state transitions are defined so the same inputs lead to the same decision.
Execution awareness
Symbol properties, spread, filling modes, sessions, restarts and trade errors are treated as part of the system.
Risk before cosmetics
Position sizing, exposure limits, invalidation and failure behaviour are designed before dashboards and visual polish.
Development process
From trading rules to a reviewable MT5 build.
The exact scope depends on the project, but a serious Expert Advisor normally passes through four controlled stages.
Specify
We define signals, data dependencies, position rules, exceptional cases and acceptance criteria before implementation.
Engineer
The MQL5 build separates signal logic, execution, position management and reporting wherever the scope requires it.
Challenge
Backtests, edge cases, restart behaviour, different symbols or brokers, and failure conditions are reviewed against the agreed specification.
Hand off
Delivery is accompanied by the agreed files, parameter notes, test evidence and a clear statement of what the system does—and does not—guarantee.
Possible scope
Built around the actual problem—not a generic robot template.
Depending on the agreed project, development may cover the following areas.
- Expert Advisors for defined discretionary or systematic strategies
- Indicators, scanners, dashboards and multi-symbol monitoring tools
- Risk managers, trade supervisors and portfolio-level controls
- MT4-to-MT5 migration, Pine Script conversion and legacy-code review
- Broker, symbol, session and execution compatibility work
- Debugging, optimization design and evidence-focused backtest review
Project fit
Selective work produces clearer outcomes.
A good fit
- You can explain the trading hypothesis and the decision process.
- You accept that testing evaluates a model; it does not promise future profit.
- You value documented rules, risk controls and maintainable code.
Not a good fit
- You need a guaranteed-profit robot or a fabricated backtest.
- You want hidden risk, unlimited recovery logic or claims that cannot be verified.
- You expect implementation to repair an undefined or contradictory strategy by itself.
Related evidence
See how POLARIS approaches systems and validation.
Algorithmic trading systems
Review current Expert Advisor, indicator and supervisor profiles.
↗MQL5 and strategy research
Read practical notes about specifications, testing, execution and failure modes.
↗Algorithmic portfolios
See why a collection of robots still needs allocation, correlation and portfolio-level risk control.
↗Frequently asked questions
Before starting an MQL5 development project.
What does an MQL5 developer need before coding?
A usable specification should define signal conditions, timeframe and data assumptions, position rules, risk logic, exceptional cases and acceptance tests. POLARIS can help turn a structured trading idea into that specification.
Can you develop a custom Expert Advisor for MT5?
Yes, selected projects can include custom Expert Advisors, indicators, risk managers, integrations, conversions and debugging. Scope and deliverables are agreed before implementation.
Can an existing strategy be converted to an EA?
Often yes, provided the decisions can be expressed as deterministic rules. Subjective phrases such as “strong momentum” or “important zone” must first be translated into measurable conditions.
Do you guarantee that a developed EA will be profitable?
No. Development can make rules explicit, execution consistent and testing repeatable. It cannot guarantee future market performance.
Do you work only on complete new robots?
No. Suitable work may include code review, bug repair, MT4-to-MT5 migration, Pine Script conversion, risk-control modules, dashboards and improvements to an existing MQL5 project.
How much does this service cost?
There is no responsible fixed price before the specification is reviewed. The quote reflects rule clarity, integrations, symbol coverage, testing depth and required hand-off.
How long does development take?
Timing is agreed after scope review. A focused repair or module can be shorter than a multi-symbol system with integrations, extensive edge cases and forward-test support.
Project fit
Start with the rules, not the promise.
Send a concise description of the strategy, required platform behaviour and available evidence. POLARIS will first determine whether the idea is specific enough to engineer and test responsibly.
Submit a project outline →