Crypto exchange order book screen

Crypto exchange order book screen displaying real-time market depth and liquidity.

About this subject

An order book is an electronic list of buy and sell orders for a financial asset, organized by price and volume. On crypto exchanges, it is essential for understanding instantaneous supply and demand. The screen displays the bid and ask sides, with the spread between the highest buy and lowest sell price. This spread is a liquidity indicator: tight spreads indicate liquid markets, common in pairs like BTC/USDT on platforms such as Binance or Coinbase. The order book also shows depth, i.e., the cumulative orders at each price level. Traders use this data to identify support and resistance levels, as well as to detect large orders that may affect price. In volatile markets, the order book can change dramatically within seconds, reflecting news or whale movements. The underlying technology is high-frequency, with WebSocket updates for minimal latency. Exchanges like Kraken and Bitstamp popularized order books in the early 2010s, but the concept originates from traditional stock exchanges, where it was known as the book of offers.

Frequently Asked Questions

What does spread mean in the order book?

Spread is the difference between the highest bid and the lowest ask price. A small spread indicates high liquidity and low transaction costs.

How to interpret order book depth?

Depth shows the cumulative orders at each price level. Large order blocks can act as support or resistance, influencing price movements.

What is the difference between order book and traditional order book?

The concept is the same, but in crypto the order book is digital, updated in real-time via WebSocket, with much lower latency than traditional systems.