MQL5 development · Pineify guide

Start MQL5 coding with a clear specification

You can start with a description instead of a blank source file. Pineify can help turn that description into editable MQL5, but choosing the rules and checking the result remain part of the job. Begin with behavior you can recognize on a chart.

Open Pineify

Open the Coding Agent and select MQL5. Account and plan usage limits apply.

Pineify MQL5 workspace showing a task description and editable EA source — An existing MQL5 source workspace. This image does not establish that a compiler check or backtest passed.

Translate a trading idea into observable rules

Choose the program type

An indicator displays calculations; an EA can respond to market events and submit orders; a script performs a one-off task. Ask for the smallest type that solves your problem.

Specify the signal

Name the symbol, timeframe, indicator parameters, and exact condition. Say whether the rule uses a completed candle or an updating candle, and whether one signal or repeated signals are expected.

Define the output

For an indicator, specify plot placement and alerts. For an EA, specify order direction, exits, sizing, maximum positions, and behavior when trading is unavailable.

Write examples you can check

Describe a case that should trigger and a case that should not. Include invalid settings or missing data. These examples help you review the output without treating a plausible explanation as proof.

Start with a visible result

Illustrative request for your own development workflow, not a tested trading strategy.

Create an MQL5 indicator that marks a completed bar when its close crosses above a configurable moving average. Explain exactly which two bars are compared. Do not place orders. Describe the inputs and expected plot, handle unavailable data, and list anything I must install. Ask me whether to check the final source.

1. Ask for an explanation before extending the code
Have the assistant explain each input, signal condition, and dependency in plain language. Resolve ambiguity before adding another filter or timeframe.
2. Request diagnostics
In Pineify, explicitly ask to check or fix syntax errors. Review failures and retry after changes. If the service is unavailable, treat the source as unverified and compile it locally.
3. Check behavior in MT5
Save the source, compile it in MetaEditor, and compare chart behavior with your examples. For an EA, use Strategy Tester and demo testing before considering live execution.

What still needs verification

You still need MetaEditor and a suitable MT5 environment to verify the final program. A source file does not become a tested trading system just because an AI generated it. MQL5 and MQL4 have different APIs; do not expect an MQL5 EA to run in MT4 through a general compatibility switch.

If the specification involves custom libraries, broker-specific execution, or portfolio-wide controls you cannot evaluate, obtain a qualified code review. An assistant can explain code, but that explanation is not an independent audit. Pineify’s current checker submits one source file and may not have your local dependencies.

Official documentation

For Pineify’s workflow and examples, see the MQL5 Coding Agent. Check the current pricing and your account allowance before starting a larger project.

Questions about this workflow

Do I need to write every line myself?

No. You can ask Pineify to draft and revise the source from a written specification. You still need to understand the intended behavior and arrange review and testing when you cannot verify the implementation yourself.

Can I use the same file for MT4 and MT5?

Do not assume so. MQL5 targets MetaTrader 5, while MetaTrader 4 uses MQL4. Porting requires reviewing language and trading API differences and testing each implementation separately.

Does a compiler pass mean the rules are correct?

No. A program can compile while evaluating the wrong candle, opening duplicate trades, or using unsuitable inputs. Compare runtime behavior with your specification.

Is this cheaper than hiring a developer?

That depends on the task, current plan limits, and the review work required. This page does not claim a fixed freelancer price or a guaranteed time saving. Check Pineify pricing and obtain a project-specific quote when specialist review is needed.

Start with a task you can check

Bring your requirements or existing source to Pineify. Review the draft, request diagnostics, and validate the final program in MT5.