Run a TradingView screener query (unauthenticated scanner, ~3000 fields).

Use for: ranking/filtering instruments by indicator or fundamental values, finding oversold pairs, volume leaders, etc. US-equity quotes are 15-min delayed; forex/crypto are near-realtime. Timeframe-scoped fields take a suffix, e.g. 'RSI|15' for M15 RSI.

Technical-analysis summary per symbol: overall/MA/oscillator ratings plus RSI and close.

Ratings are TradingView's precomputed Recommend.* fields mapped to STRONG_BUY..STRONG_SELL. Use for a quick bias read, not as a trade signal.

Search TradingView's symbol directory. Returns exchange-qualified tickers with descriptions and types.

Diagnose this install: check every prerequisite, return exact fixes.

Each check reports {name, ok, detail, optional} and - when broken - a fix holding the exact shell command to run. Run the fixes for anything with ok=false and optional=false, rerun the doctor, and the server is fully operational. Credential checks (OANDA key, TV session cookie) are optional and always require the human - never attempt to obtain credentials.

Which OHLCV data providers are usable right now, and why not if not.

Fetch historical OHLCV bars. Cached in Parquet; repeat queries are instant.

Providers: dukascopy (free, deep history to ~2000s, first fetch of a range is slow) and oanda (real broker mid prices, needs OANDA_API_KEY). Bars are UTC, returned as arrays [time_iso, open, high, low, close, volume]. The provider field in the result names the feed - feeds disagree; levels are feed-specific.