Below are the fields included in Real-Time Tick Streaming with TrueData Market API (WebSocket):
Symbol ID, Date-Time (Timestamp), LTP, LTQ, ATP (Average Traded Price – for the day), TTQ (Total Traded Qty – Volume for the day), Open, High, Low, Prev Close, OI (Open Interest), Prev Open Int Close, Day’s Turnover, Special Tag (”OHL” , "H", "L" or “”), Tick Sequence No, Bid, Bid Qty, Ask, Ask Qty