A Bid Book is a record or listing that showcases buy orders for a specific asset, including cryptocurrencies. It serves as a vital tool for traders to see how much demand exists for a particular coin at various price levels.

In a Bid Book, orders are typically organized by price, with higher bids (prices that buyers are willing to pay) prioritized at the top. This helps traders gauge market sentiment and make informed decisions about their own buying strategies. The information in a Bid Book can support traders in identifying possible levels of support or resistance, influencing when to enter or exit a trade.

It reflects real-time market activity, providing insights into buyer behavior and overall market health. Overall, the Bid Book plays a crucial role in the trading ecosystem, enabling participants to make smarter, data-driven choices based on actual demand.