Data & Screeners

Free, no-frills screener of SEC Form 4 insider buying and selling, updated continuously. Good for spotting clusters of insider purchases; the site is old-school but the data is straight from EDGAR.

The fastest free stock screener on the web, plus heat maps, insider trades and news. Delayed data on the free tier; Elite adds real-time quotes, backtests and intraday charts. A daily tab for most US stock traders.

Bloomberg-style dashboards, fundamentals, estimates and macro data for individuals, with a generous free tier. Best for traders who care about earnings, valuation and cross-asset context rather than pure price action.

Clean, fast site for financial statements, ratios, ETF holdings, IPO calendars and a stock screener. Almost everything is free and ad-light; a good replacement for older finance portals.

Quotes, futures and options chains, commodity data and screeners with unusually good coverage of futures and ag markets. Free with ads; paid tiers unlock more screener columns and downloads.

Options flow, dark pool prints and congressional trading data with a large retail following. Useful for seeing where large options bets are placed; flow is not a signal on its own, so treat it as context.

Options analytics: implied volatility rank, earnings move history, unusual volume and strategy screeners. Aimed at options traders who want data rather than opinions; core pages are free, deeper screens are paid.

Crypto price, volume, market-cap and exchange data covering thousands of tokens, with a free public API. The standard reference for crypto market data alongside CoinMarketCap.

Free database of 800,000+ economic time series from the St. Louis Fed, with charts, downloads and an API. If you want to see rates, inflation, employment or credit spreads yourself instead of through a pundit, start here.

Developer-focused market data API for US stocks, options, indices, forex and crypto, with a free tier for delayed data. The usual choice for hobby algo traders building their own tools; rebranded from Polygon.io in 2025.

Search the actual text of SEC filings (10-K, 10-Q, 8-K, S-1, Form 4) from 2001 onward for free. The primary source behind every fundamentals site; useful when you need the risk-factor wording, not a summary of it.

Visual options strategy builder and profit/loss calculator with live chains, plus a flow scanner on paid tiers. Handy for sanity-checking a multi-leg trade before you place it; the builder is free.