Article

What is the order book and how do you read it?

July 29, 2026

The order book is a live-updating table that lists the buy and sell orders placed for a trading pair (for example, BTC-TRY) by price and amount. Reading the order book helps you understand market supply and demand, see price levels while trading, and place limit orders rationally.

What is shown in the order book?

The order book lists every pending limit order placed for the selected pair in two sections: buy orders and sell orders. Each row represents the total amount available at a given price level. The gap between the buy side and the sell side — the spread — appears in the middle of the list.

Buy section (green): Orders from users who want to buy the asset at a specific price. The highest buy price sits at the top; the price decreases as you scroll down.
Sell section (red): Orders from users who want to sell the asset at a specific price. The lowest sell price sits at the top; the price increases as you scroll down.

Order book columns

The order book has three columns. The column headers change dynamically based on the selected pair's symbol.

Column	Content
Buy / Sell amount	The crypto asset amount that users want to buy or sell at that price level
Price	The unit price at which the order was placed (in TRY, USDT, or another quote asset)
Depth indicator	The coloured bar in the row background; visually reflects the cumulative volume on that side

The standard view shows 12 rows in total, while OrderBookPro in the advanced view displays an expandable number of rows. In the advanced view, you can switch the display to "buys only", "sells only", or "both at once".

What is the spread?

The spread is the difference between the highest buy price and the lowest sell price in the order book. You can find how the price is formed through this matching mechanism in the How are crypto asset prices formed? article. A narrow spread indicates that the market is liquid and competitive; a wide spread indicates an imbalance between supply and demand or weak liquidity in that pair.

Note: If the highest buy price for the BTC-TRY pair is TRY 2,000,000 and the lowest sell price is TRY 2,000,500, the spread is TRY 500. A user placing a market order may execute at a price TRY 500 different from what they expected because of this gap.

What does depth mean?

Depth is the total volume of all open orders placed for a pair. The coloured bar in the background of each row in the order book proportionally shows the cumulative buy or sell volume up to that price level. When depth is high, large orders move the price only slightly; when depth is low, an order of the same size can cause a noticeable price move.

Quick trading from the order book

When you tap a price row in the order book, that price is automatically transferred to your trading form. This way, instead of retyping a level you see in the order book, you can apply it to your limit order with a single tap.

Note: You can change the price precision using the decimal selector (1, 10, 50, 100) below the order book. A lower value (1) shows the most precise view, while a higher value (100) shows wider price increments; you can raise the value when you want to simplify the market view

Important information

Pending limit orders appear in the order book; market orders are filled immediately without being added to the order book, while conditional orders are added to the order book when they are triggered
Your own orders are shown with a distinct marker in the order book; use the Open orders list to manage your open orders
The order book is not shown in the easy view; it is available in the standard and advanced views
Order book data updates in real time — the prices you see on screen reflect live orders in the market

Frequently asked questions

How do I see my own orders in the order book?

Your open orders are shown with a distinguishing marker on the relevant price row in the order book. To see all of your open orders in a single list, open your Open orders list.

What should I do if the spread is high?

A wide spread indicates low liquidity in that pair. If you place a large market order, your fill price may be noticeably different from what you expected (slippage). In such cases, using a limit order to set your desired price may be safer.

What happens when I tap a price row?

The price you tap is automatically transferred to the price field of the trading form open on screen. This feature lets you quickly place a limit order at a level you see in the order book.

What does the decimal selector do?

The decimal selector determines the precision at which prices in the order book are displayed. For example, when you select 100, prices are rounded to 100-unit increments and orders falling within the same range are aggregated into a single row. A low value (1) gives a detailed view, while a high value (100) lets you see order density at a broader scale.

Why is the order book missing in the easy view?

The easy view is designed for one-tap trading at the market price. The order book and order type selection are not available in this view. If you want detailed price control, you can use the standard or advanced view.