Trading Book: Understanding the Order Book in Crypto

A trading book, commonly known as an order book, is a real-time list of all buy and sell orders for a specific cryptocurrency on an exchange. It is one of the most important tools traders use to understand market activity and liquidity.

In simple terms, the trading book shows who wants to buy, who wants to sell, and at what price. It gives a clear view of supply and demand at different price levels.

Structure of a Trading Book

A trading book is divided into two main sides:

• Bids (Buy Orders): These are orders from traders who want to buy an asset at a specific price.
  
• Asks (Sell Orders): These are orders from traders who want to sell at a specific price.
  

The difference between the highest bid and the lowest ask is called the spread, and it is an important indicator of market liquidity.

How Traders Use It

Traders analyze the order book to:

• Identify support and resistance levels
• Detect large buy or sell walls
• Understand market sentiment
• Plan entry and exit points
  

Large orders (often called walls) can influence price movement because they show strong buying or selling interest.

Why It Matters

The trading book reflects the real-time behavior of market participants. It helps traders see beyond price charts and understand what is happening behind the scenes.

• High liquidity → tight spread and smoother trading
• Low liquidity → wider spread and more volatility
  

The trading book is a powerful tool that shows the balance between buyers and sellers in the market. By learning how to read it, traders can gain deeper insight into price movements and make more informed decisions.

👉 Key takeaway: The order book reveals the intentions of the market—those who understand it have an edge.