Practical Guide to A-share Level-2 Market Data API

Millisecond-level latency, ten-level order book, tick-by-tick transactions – an in-depth interpretation of the technical architecture and access practices of Level-2 market data In the field of quantitative trading, data is the soul of strategies. If Level-1 market data lets you see the "surface" of the market, then Level-2 market data allows you to insight into the "pulse" of the market – the game of every order, the depth of each price level, and the active direction of every transaction. This article systematically introduces the technical characteristics, access solutions, and practical applications of the A-share Level-2 market data API, helping developers build a solid data foundation on the path of quantitative trading. I. Level-2 Market Data: A Microscopic Perspective Beyond Traditional Market Data 1.1 What is Level-2 Market Data? Level-2 market data is the most complete and fine-grained trading information data in China's domestic securities market to date. Compared with tradi