[FAQ]
Frequently asked questions about AXIS, engines, offline use, TradingView relation, and data privacy.
FAQ
Product scope
Is AXIS TradingView?
No. AXIS is an independent charting PWA. Pine Script™ and TradingView® are trademarks of TradingView, Inc. This project is not affiliated with or endorsed by TradingView, Inc. Trademark notice appears on the AXIS docs home.
Does AXIS implement Pine Script?
Evaluation is performed by engines that call PYNE (or proxies that do). The AXIS does not embed a closed interpreter. See PYNE for language fidelity.
AXIS vs engine?
AXIS = UI + orchestration. Engine = run(script, bars). You can swap engines without rewriting the chart host. That is ADR-002 territory—ADRs.
Running & offline
Can I use AXIS fully offline?
Yes, with recipe Offline lab: mock-walk + mock-poll + pyodide + local, after one warm-up so Pyodide assets cache. Server engine and live venue streams require network.
Why is first Pyodide run slow?
Bootstraps Python + wheels in-browser. Subsequent runs reuse the runtime when still warm. Assets are self-hosted under the PWA origin when deployed correctly.
Default endpoint points at a VPS—is that required?
No. Change Settings → Backend URL to http://localhost:5002 or your Worker. Defaults may reference a public demo API host for convenience.
Data & privacy
Where do API keys live?
In this browser’s localStorage state / pluginsConfig. They are sent as HTTP headers only to endpoints you configure (cloud storage, etc.). They are not part of the Pine script body.
Are OHLCV bars uploaded?
Server engine sends script + bars to the configured endpoint for that run. Pyodide keeps bars local. Choose engine accordingly.
Are bars saved on disk?
App state persistence omits bars, lastRun, and logs to control size. History is re-fetched on Load.
Features
How do I share a setup?
Legacy hash state (state-hash.js) can encode symbol/interval/engine/source/stream (and short scripts). Prefer documenting the four-tuple + library export for durable sharing. URL-load plugins are re-fetched by install list.
Can I use my own data vendor?
Yes—implement a source plugin (and optional stream) and install via URL or built-in registration. See Plugins.
Why Strategy tab shows no trades?
Need paired entry/exit-style events with prices. Indicators that only plot will fill Plots/Metrics, not Strategy stats.
Drawings disappeared after Run
Script drawings are cleared and re-applied each run. User toolbar drawings persist across runs.
Popout editor out of sync?
Editor bridge uses shared document storage + message bridge between windows. Use Reattach on the main AXIS if the popout closed uncleanly.
Ops
What is pynescript-superchart?
Frozen Cloudflare project name. Renaming breaks bindings and CI. Brand is AXIS; infrastructure id stays.
Legacy SuperChart localStorage?
Migrated automatically into pynescript.axis.v1 and library keys. See State namespaces.
Tests for the PWA?
cd frontend && bun run test:unit
bun run test:e2e:smoke
See frontend/TESTING.md.