Pine Script to MQL Converter

Turn TradingView indicators and strategies into editable MQL4 or MQL5 source code. This converter is for traders adapting their own scripts, developers working across both environments, and researchers who want a useful first draft without manually rewriting every calculation. The result is source code to inspect and continue developing in MetaEditor, not a compiled executable or a promise that two platforms will execute identically.

How to use the converter

Start with the complete Pine Script source and choose whether it represents an indicator or an Expert Advisor. Select MQL4 or MQL5 for the target. Add clear notes about expected behavior, especially alerts, plot values, entries and exits, position sizing, stop-loss rules, session limits, or multi-timeframe calculations. These details help distinguish important behavior from incidental code structure and give the translation a clearer target.

How the conversion works

  1. Understand: identify inputs, calculations, plots, alerts, entries, exits, and position rules.
  2. Translate: map Pine series and built-in functions to MQL data types, indicator access, and event structures where supported.
  3. Validate: check the generated source for common syntax and structural issues, then resolve any remaining compiler diagnostics.
  4. Review: compile, compare outputs, and adjust behavior that depends on your broker, chart setup, or target-platform version.

Code conversion involves more than substituting function names. Pine Script and MQL differ in how they index historical series, calculate indicator buffers, process bars and ticks, represent orders, and expose market data. Some calculations have straightforward equivalents; others need a custom implementation or an explicit approximation. A completed translation can therefore require manual changes even when it compiles successfully.

Test the result before relying on it

Compile the source in MetaEditor and inspect warnings as well as errors. Compare indicator values, plotted signals, and trade events with the original using the same symbol, timeframe, and date range. Then test with realistic spreads, commissions, and broker settings. Historical price feeds and execution rules vary, so matching one chart is not proof of equivalent future behavior. Use a demo or other suitable test environment before any live deployment, and make independent decisions about risk.

Frequently asked questions

Which output can I choose?

You can choose MQL4 or MQL5 source. Check which language and platform version your MetaTrader setup requires before starting.

Can I convert an indicator and an Expert Advisor?

Yes, choose the appropriate script type. Indicators plot or calculate values; Expert Advisors also need platform-specific order and position behavior.

Does the converter provide compiled files?

No. It provides editable source code for review and compilation; compiled .ex4 and .ex5 files are not provided.

Is conversion guaranteed to be exact?

No. Differences in data, timing, indexing, broker configuration, and language features may affect results. Compile and compare before use.

What if my script uses a custom function?

Include its full definition and explain the intended behavior. Custom or unsupported platform features may need manual implementation.

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