Unusual Whales vs Twelve Data
Market data API plus the curated trading-intel feeds Twelve Data does not ship: real-time options unusual activity, dark pool, congressional trades, and 13F flows.
The 30-second answer
Equities, ETFs, and options market data, OHLC, quotes, technical indicators via REST and WebSocket.
Real-time options unusual activity, sweep / block / multi-leg classification, dark pool prints with NBBO context.
Congressional trades, insider Form 4 transactions, 13F institutional flows, and an MCP integration for AI agents.
Feature comparison
Verified 2026-05-04. Comparison reflects publicly available information at the time of writing.
| Capability | Unusual Whales | Twelve Data |
|---|---|---|
| REST API for market data | ✓ Yes | ✓ Yes |
| WebSocket streaming | ✓ Yes | ✓ Yes |
| OHLC bars and historical data | ✓ Yes | ✓ Yes |
| Technical indicators | ✓ Yes | ✓ Yes |
| Option chains and contract data | ✓ Yes | ✓ Yes |
| Real-time options unusual activity feed | ✓ Yes | — |
| Sweep, block, and multi-leg classification | ✓ Yes | — |
| Dark pool print feed with NBBO context | ✓ Yes | — |
| Congressional trade tracking | ✓ Yes | — |
| Insider Form 4 transactions | ✓ Yes | — |
| 13F institutional flow tracking | ✓ Yes | — |
| Greek exposure (GEX/DEX/Vanna/Charm) feed | ✓ Yes | — |
| Net premium / net flow analytics | ✓ Yes | — |
| Kafka streaming (enterprise) | ✓ Yes | — |
| MCP integration for AI agents | ✓ Yes | — |
Why people switch from Twelve Data to Unusual Whales
Trading-intel layer on top of market data
Twelve Data ships raw market data. Unusual Whales ships the curated trading-intel feeds on top: unusual options activity, dark pool, GEX, net premium, congressional, and 13F.
Alternative data included
Congressional trades, insider transactions, and 13F flows are part of the same API.
Built-in dashboard
If you want a UI alongside the API, Unusual Whales ships one out of the box. Twelve Data is API-only.
AI-native
Plug Unusual Whales into Claude, ChatGPT, or Cursor through MCP and run natural-language analysis across every dataset.
Frequently asked
Can I use Unusual Whales as a Twelve Data replacement?+
If you use Twelve Data for market data, technical indicators, or option chains, yes. Unusual Whales provides equivalent endpoints plus the curated unusual-activity, dark pool, congressional, and 13F feeds Twelve Data does not include.
Does Unusual Whales offer technical indicators?+
Yes. RSI, MACD, Bollinger Bands, SMA, EMA, ATR, and 50+ more technical indicators via the API.
Does Unusual Whales support international markets?+
Unusual Whales is focused on US equities and options. For broader international coverage you may want to combine us with another vendor.
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