Order Book

What is an Order Book?

An order book is a record that shows all the current buy and sell orders for a financial instrument, such as EURUSD. It lists the prices at which traders are willing to buy and the prices at which they are willing to sell.

You can think of the order book like a digital marketplace board: buyers write down the price they want to pay, and sellers write down the price they want to receive. The trading platform then uses this information to match buyers and sellers.

How the Order Book in Trading Works?

When people talk about the order book in trading, they mean using the information in the order book to make trading decisions. The book shows two main sides:

• Buy side (bids) – orders from traders who want to buy at certain prices.
• Sell side (asks) – orders from traders who want to sell at certain prices.

For example, if you place a buy order for EURUSD at 1.10201, it goes into the order book until a seller agrees to trade with you at that price. This is how trades get executed.

Why the Order Book Matters

The order book is important for traders because it shows where demand (buyers) and supply (sellers) are in the market. Traders use this to:

• Understand whether buying or selling interest is stronger.
• Spot price levels where large numbers of orders are waiting.
• Decide when to enter or exit trades.

For example, if the order book in trading shows a large number of buy orders at 1.10100 on EURUSD, it may signal strong interest in that level, which could influence how the price behaves.