Here's every option — from free to professional — so you know exactly what you're getting.
Binance WebSocket
FREE · No key needed
True real-time tick-by-tick data for crypto futures. BTC, ETH, and 300+ pairs. Used directly in this tool. Best free option available.
📈 Crypto only
Yahoo Finance
FREE · 15min delayed
Covers ES, NQ, CL, GC and most traditional futures. Data is 15 minutes delayed. Unofficial/unstable — can break without warning. Fine for learning.
📈 Stocks, ETFs, Futures, Forex
Alpha Vantage
FREE tier · API key
Free tier: 25 requests/day, end-of-day data. Premium plans ~$50/mo unlock intraday. Good for learning, not live trading.
📈 Stocks, Forex, Crypto, some Commodities
Barchart OnDemand
PAID · ~$100-500/mo
Professional delayed and real-time futures data. Covers all CME products. REST API + WebSocket. Reliable, developer-friendly.
📈 Full futures, options, equities
Databento
PAID · Pay-per-use
Institutional-grade tick data direct from CME, ICE, Eurex. Sub-microsecond timestamps. Best for serious algo trading. $0.50/GB+.
📈 All major futures exchanges globally
IBKR / Thinkorswim
BROKER API · Account required
Interactive Brokers and TD Ameritrade/Schwab Thinkorswim provide free real-time data if you have an account. Best combo: paper trade account + free real data.
📈 Everything — stocks, futures, options, forex