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Pine parity
PyneCore reproduces the Pine Script reference output with 99.999%+ numeric match. This is not aspirational — it is the explicit acceptance criterion built into the test suite. Every Pine function is verified against TradingView reference values, with floating-point comparison under strict numerical tolerance.
The test infrastructure is unusual: tests are themselves Pyne scripts. Each test file is both a runnable Pyne program and a pytest case, executed by the same runtime that ships to users. This catches behavioral drift that traditional unit tests miss — if a test passes, the production runtime passes too.
CSV reference data for indicators and strategies is exported directly from TradingView and committed to the repository. New Pine features are tested against actual reference output, not against a separate specification.
Architecture
PyneCore is a from-scratch Python runtime, not a wrapper or interpreter. Pine-like semantics — Persistent variables, Series, function isolation, NA handling — are produced by AST transformations that rewrite Python code at import time. The output is regular Python that runs on any standard interpreter.
The runtime has zero external dependencies. The full PyneCore package depends only on the Python standard library. This is a deliberate constraint, not a coincidence: zero dependencies makes the runtime portable to constrained environments — most importantly, the browser via WebAssembly.
The architecture splits into two parts. PyneCore — the open-source runtime — executes Pyne scripts. PyneComp — the closed-source compiler — translates Pine Script source into Pyne. The split is intentional. See the open source vs commercial section below.
Integration model
Three integration patterns, in order of increasing depth.
API today. REST API at api.pynesys.io with pre-paid credit packages from $500. Submit Pine Script source, receive Pyne output. Suitable for indie projects, prototypes, and back-office automation.
Browser execution (Q4 2026). Full PyneCore loaded into the browser via Pyodide WebAssembly. Strategies execute on the user’s machine with no server-side compute. Suitable for embedded backtesting and live execution within partner platforms.
Embeddable SDK (Q1 2027). Drop-in JavaScript SDK that bundles the WASM runtime, charting, and execution UI. White-label by configuration. Designed for brokers, exchanges, and fintech apps that want Pine-compatible execution branded as their own feature.
All three patterns share the same runtime. The only difference is deployment.
Compatibility
Pine Script v5 is the supported version. Indicator coverage is substantial — ta.*, math.*, str.*, array.*, line.*, label.*, plot, hline, fill, table, and the full set of plotting and drawing primitives.
Strategy support includes the harder cases: bar magnifier for intra-bar precision, varip semantics, calc_after_order_fill, and multi-timeframe access via request.security. The strategy execution model mirrors TradingView’s, including order fill timing and equity calculation.
Areas under active expansion: less common Pine functions, edge cases in commission and slippage models, and additional drawing primitives. The full compatibility matrix lives in the pynecore.org documentation and is updated with each release.
Performance
CPython execution closely matches Pine Script performance for typical scripts. The runtime is implemented in pure Python without C extensions, which simplifies portability without sacrificing speed.
PyPy is validated and yields a 5x speedup with zero code changes — a direct consequence of the zero-dependency architecture. There is nothing for PyPy to fall back from.
WebAssembly execution via Pyodide runs at approximately one-third of CPython speed. For live trading at one bar per minute, this is more than sufficient. For limited-bar backtests in the browser, the latency is imperceptible.
Heavy backtests on long histories should run server-side or under PyPy on the user’s machine. The choice is per-use-case, not per-runtime.
Open source vs commercial
PyneCore is licensed under Apache 2.0. The full source, test suite, and documentation are public on GitHub. Community contributions are welcomed via standard pull request flow. Commercial use is permitted under standard Apache 2.0 terms, including embedding in proprietary products, with attribution per the project’s NOTICE file.
PyneComp — the Pine Script to Pyne compiler — is closed source and offered as a SaaS service. This split is deliberate. The runtime is the foundation; making it open ensures portability, transparency, and ecosystem trust. The compiler is the engineering investment that translates a closed scripting language into the open runtime, and keeping it commercial is what funds the work.
The result is an ecosystem where the integration surface — PyneCore — is permanently free to use, and the value-added service — PyneComp — sustains the project. Partners integrating PyneCore are not building into a vendor trap.
Introduction
This Privacy Policy describes how PyNE Systems (“we,” “our,” or “us”) collects, uses, and discloses your personal information when you visit our website, www.pynesys.com (“Website”), use our services, or otherwise interact with us.
We respect your privacy and are committed to protecting your personal information. This Privacy Policy explains what information we collect, how we use it, and the choices you have regarding your information.
Information We Collect
Information You Provide to Us
We collect information that you voluntarily provide to us, including:
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Information We Collect Automatically
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How We Use Your Information
We use the information we collect for various purposes, including:
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Google reCAPTCHA
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Cookies and Tracking Technologies
We use cookies and similar tracking technologies to collect information about your browsing activities. Cookies are small text files that are stored on your device when you visit our Website.
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Data Retention
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Security of Your Information
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International Data Transfers
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Changes to This Privacy Policy
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Contact Us
If you have any questions or concerns about this Privacy Policy, please contact us at:
PyNE Systems Email: [email protected]
By using our Website, you acknowledge that you have read and understood this Privacy Policy.
Introduction
These Terms of Use (“Terms”) govern your access to and use of www.pynesys.com (“Website”), operated by PyNE Systems (“we,” “our,” or “us”). By accessing or using our Website, you agree to be bound by these Terms. If you do not agree to these Terms, please do not use the Website.
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No Warranty
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Limitation of Liability
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Google reCAPTCHA
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Changes to the Terms
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Governing Law and Jurisdiction
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Termination
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General Provisions
Entire Agreement
These Terms constitute the entire agreement between you and PyNE Systems regarding your use of the Website and supersede any prior agreements.
Waiver
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Severability
If any provision of these Terms is held to be invalid or unenforceable, such provision shall be struck and the remaining provisions shall be enforced.
Contact Information
If you have any questions about these Terms, please contact us at: https://pynesys.com/contact
By using our Website, you acknowledge that you have read and understood these Terms.
