Crypto order book depth

Q: What is order book depth?

The dollars of buy and sell orders waiting near the current price. CoinBeacon measures it within 1% and 2% of the mid price, on each side, from one read of the exchange's public order book.

Q: How is the slippage of a market order worked out?

For a $1K, $10K or $100K market order, CoinBeacon walks the orders read from the best price outwards and compares the average fill with the mid price. A buy prints how far above the mid it would fill, a sell how far below.

Q: Why does BTC show ≥ instead of a number?

Its book is so full near the price that 500 levels reach only about 0.1% from the mid, short of 1%. The cell then shows the dollars of every level read, marked ≥: at least that much is within that distance.

Q: Which exchanges are covered?

Depth and market-order costs come from Binance Spot, Binance Futures, Bybit Futures, OKX Futures and Gate.io Futures, where the futures are perpetual contracts. The bid-ask spread in Price comparison and the Screener comes from Binance, Bybit, OKX, Gate.io and HTX.

Q: Is the order book free?

Yes. The coin page's order book needs a free account, and each account can take 6 live reads a minute. The figures on Pumping & Dumping, Volume movers and New listings are open to everyone.

Q: How often is it updated?

On the coin page, when you open it, pick an exchange or press Read again, which appears once a read is 100 seconds old. A board row is read once, when its move or listing is spotted; a Volume movers row is read again about every 15 minutes while it stays in the top 30.

Q: Does CoinBeacon detect spoofing or buy walls?

No. It shows the figures of one read and draws no conclusion from them. Orders can be added or cancelled at any moment, and some never show in a public book.

CoinBeacon reads a coin's public order book on five markets and turns it into a few figures: the dollars of buy and sell orders within 1% and 2% of the price, the bid-ask spread, and what a $1K, $10K or $100K market order would pay. A free account shows it on the coin page.

Markets: 5
Levels read: Up to 500 a side
Market orders: $1K · $10K · $100K
Price: Free

Open BTC's order book Compare bid and ask

The order book on a coin page

Open a coin's Markets tab and pick an exchange. The panel shows one read of that exchange's public order book, with the time it was taken.

LINK order book

Binance SpotBinance FuturesBybit FuturesOKX FuturesGate.io Futures

Visible book

Bybit Futures · read 14:02 UTC

Within	Buy orders	Sell orders
1% of the price	$412.3K	$388.9K
2% of the price	$1.06M	$972.5K

Market order	Buy	Sell
$1K	+0.01%	−0.01%
$10K	+0.02%	−0.03%
$100K	+0.21%	−0.24%

Bid-ask spread 0.02%

An example read with made-up figures, not market data.

What each figure means

Mid price: The midpoint between the best buy order and the best sell order. Every distance and cost on the panel is measured from it.
Bid-ask spread: The gap between the best buy order (the bid) and the best sell order (the ask), as a percentage of the mid price.
Within 1% and 2% of the price: The dollars of buy orders priced down to 1% or 2% below the mid, and of sell orders priced up to 1% or 2% above it.
Market order: The average price a $1K, $10K or $100K order would have paid against the orders read, compared with the mid. A buy walks the sell orders and prints a plus; a sell walks the buy orders and prints a minus.
≥ and —: ≥ means the levels read stop inside that distance, so at least that much is there. — means the read stops short of the figure.
Read time: When CoinBeacon received the read, in UTC. A read from an earlier day shows its date.

BTC's book holds so many orders near the price that 500 levels reach only about 0.1% from the mid, so its 1% and 2% cells print a floor.

BTC order book

Visible book

Binance Spot · read 14:05 UTC

Within	Buy orders	Sell orders
1% of the price	≥$6.84M	≥$5.91M
2% of the price	≥$6.84M	≥$5.91M

Market order	Buy	Sell
$1K	<0.01%	<0.01%
$10K	<0.01%	<0.01%
$100K	<0.01%	<0.01%

Bid-ask spread under 0.01%

≥: the levels read reach less than that distance from the price, so at least that much.

An example read with made-up figures, not market data.

Where the order book shows up

Coin pages: The Markets tab of any coin listed on Binance Spot, Binance Futures, Bybit Futures, OKX Futures or Gate.io Futures, with a chip for each exchange. It needs a free account.
Pumping & Dumping: Each spotted move carries the book as it was read when the move was spotted: the dollars within 1% and 2%, and a $1K and a $10K market order.
Volume movers: The top 30 volume surges carry a read too, taken again about every 15 minutes while a market stays in the top 30.
New listings: A new market on Binance spot or perpetuals, or on Bybit, OKX or Gate.io perpetuals, is read once, when the log adds it, and its row shows the dollars within 2%.
Alerts: Pump and dump alerts carry the read as one line, such as “Visible book 14:02 UTC: $1.06M buy / $972.5K sell orders within 2%, bid-ask spread 0.02%”, and new-listing alerts carry the same line with the date.
Price comparison: The lowest ask and the highest bid across exchanges, and each exchange's bid-ask spread, kept for Binance, Bybit, OKX, Gate.io and HTX.
Screener and multi-condition alerts: Bid-ask spread is a Screener filter, with quick choices from under 0.02% to over 1%, and a condition in multi-condition alerts.
Ask Cobi: Cobi can read one coin's order book on one exchange and answer questions about the spread, liquidity and slippage.

How a read is taken

One request to the exchange: Each read is one request to the exchange's public order book: up to 500 levels a side on Binance Spot, Binance Futures and Bybit Futures, 400 on OKX Futures and 200 on Gate.io Futures. Only dollar-quoted markets are read.
When the coin page reads: When you open the Markets tab, and when you pick another exchange. “Read again” appears once a read is 100 seconds old. The page never reads on a timer.
Live reads per account: Each account can take 6 live reads a minute. A read under 100 seconds old is served again and does not count.
Checked before it is shown: A read is refused if it is empty, crossed, more than 60 seconds old by the exchange's own clock, or if its mid price is more than 25% from the coin's price.

What it does not tell you

It is one moment: Orders can be added or cancelled at any moment, and some orders never show in a public book.
Figures, not verdicts: The panel never calls a book thin, deep, risky or safe, and no figure is coloured by its value.
No wall or spoofing alerts: CoinBeacon does not flag walls, imbalance or spoofing. The Buy wall and Sell wall tags on Volume movers come from trades, not from the order book.

Order book FAQ

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What is order book depth?

The dollars of buy and sell orders waiting near the current price. CoinBeacon measures it within 1% and 2% of the mid price, on each side, from one read of the exchange's public order book.

How is the slippage of a market order worked out?

For a $1K, $10K or $100K market order, CoinBeacon walks the orders read from the best price outwards and compares the average fill with the mid price. A buy prints how far above the mid it would fill, a sell how far below.

Why does BTC show ≥ instead of a number?

Its book is so full near the price that 500 levels reach only about 0.1% from the mid, short of 1%. The cell then shows the dollars of every level read, marked ≥: at least that much is within that distance.

Which exchanges are covered?

Depth and market-order costs come from Binance Spot, Binance Futures, Bybit Futures, OKX Futures and Gate.io Futures, where the futures are perpetual contracts. The bid-ask spread in Price comparison and the Screener comes from Binance, Bybit, OKX, Gate.io and HTX.

Is the order book free?

Yes. The coin page's order book needs a free account, and each account can take 6 live reads a minute. The figures on Pumping & Dumping, Volume movers and New listings are open to everyone.

How often is it updated?

On the coin page, when you open it, pick an exchange or press Read again, which appears once a read is 100 seconds old. A board row is read once, when its move or listing is spotted; a Volume movers row is read again about every 15 minutes while it stays in the top 30.

Does CoinBeacon detect spoofing or buy walls?

No. It shows the figures of one read and draws no conclusion from them. Orders can be added or cancelled at any moment, and some never show in a public book.

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