What is the difference between Level I and Level II data? .

Level I data provides a view of the last Bid, Bid Size, Ask, Ask Size, Volume, High Bid, Low Bid, and other information for a particular symbol.

Level II data provides a detailed view of the last 30 Bid and Ask positions/offers posted by Market Makers. Time and Sales information is available for the most recent 30 trades.

QuoteMedia currently only offers NASDAQ Real-Time Level 2 data, Pink Sheets Real-Time Level 2 data, and Canadian Real-Time Level 2 data. Please note, you must purchase Real-Time Level I data packages to purchase Real-Time Level II data packages for a specific exchange.

Pink Sheet and Canadian Level II data is not available in "delayed" mode.