otFeed is opentick corporation's flagship product for expert traders, developers and financial institutions. otFeed offers one consolidated application program interface (API) to deliver your data on popular trading platforms for free. otFeed includes a variety of noteworthy features including:
Free Real-time Data
Real-time market data for most U.S. stock, option, and futures exchanges.
Real-time market data for ECN's and regional exchanges included.
Real-time option chains.
Free Historical Data
Open, High, Low, Close (OHLC) data in intra-day, inter-day, and tick based time frames.
Several years of historical tick data available for most U.S Domestic Exchanges.
otFeed