How to Read a Crypto Order Book: Bids, Asks, Walls and Zones

Author: Crypffalo Research · 22:43 23/10/2026

The order book is the list of resting buy and sell orders. How to read bids, asks, spread, depth, the order book heatmap, walls, support and resistance zones, the balance strip, and how to spot fake orders on DeepDom.

How to Read a Crypto Order Book: Bids, Asks, Walls and Zones

The order book is the list of orders waiting to be filled on an exchange. Resting buy orders (bids) sit below the current price and resting sell orders (asks) sit above. Reading it shows you where money is waiting, not just where price has been.

This guide moves from basics to reading each layer on DeepDom, Crypffalo's multi-exchange order book and order flow tab.

Quick summary

Bids and asks: bids wait to buy below price, asks wait to sell above; the gap between them is the spread.
Depth: total resting money within a price range, e.g. ±1% around price.
Walls: price levels with unusually large resting orders that can slow price down.
Price zones: several thick levels standing long enough merge into support or resistance.
Caution: resting orders are not money in the market yet and can be pulled.

What is an order book?

When you place a limit order, it rests in the book until it fills or is cancelled. The book shows how much money is waiting to buy or sell at each price.

A market order fills immediately against the best resting order. That is "aggressive" flow, measured by CVD.

Bids, asks, spread and depth

Sample order book: asks above, bids below, walls are unusually large orders.

Bid: the highest price someone is waiting to buy at.
Ask: the lowest price someone is waiting to sell at.
Spread: the gap between bid and ask. A tight spread means good liquidity; a sudden widening often comes before big news.
Depth: total resting money in a range. A deep book absorbs large orders with little slippage; a thin book lets price run.

Reading the order book on DeepDom: 5 main layers

DeepDom snapshots the Binance Futures order book every second within ±2% of price. Toggle each layer with the "Order book", "Order walls" and "Price zones" buttons above the chart. The "How to read the order book" section under the tab explains every element.

Order book layers on DeepDom (captured from crypffalo.com/deepdom).

Book background (small cells): each cell is one price level over a stretch of time. Darker means more resting money. By default bid and ask cells have separate colours.
Walls: horizontal lines labelled like "Ask wall $574K · 4.962", the largest resting orders right now.
Price zones: coloured boxes merging thick levels that stood long enough. Bid zones below price can act as support, ask zones above as resistance.
Right-axis tags: e.g. "▲ 4.902–4.916 · $1.4M", the core price range and average resting money in the core.
Balance strip: a row of small cells at the bottom, one per candle, showing whether bids or asks are thicker within ±1% of price.

Reading price zones and verdict labels

Hover a zone and DeepDom opens a 4-part box: FACTS, WHAT HAPPENED, AROUND, VERDICT.

"(untested)": price has not reached the zone.
BEING TESTED / TESTED: price is inside the zone or has touched it and eaten some orders.
SUPPORT / RESISTANCE: price touched and the zone held.
STRONG: very thick, standing long enough and not swept recently.
"just swept": a wick pierced the zone edge and closed back inside; not strong support yet.
"(just rebuilt)": a new zone formed right where an old one was just pulled or broken.

At the right edge of the box on its last candle, a yellow × means the orders were pulled, a ⨯ in the zone colour means the zone broke, and a grey arrow means price moved more than 2% away.

Spotting fake orders (spoofing)

Spoofing is placing large orders to fake support or resistance, then pulling them as price approaches.

Signs: a big wall appears, price moves closer, and the wall disappears before filling.
On DeepDom: the event log records new large walls and pulled walls (only walls that stood for 15 minutes or more).
What to do: trust zones that held several touches more than a brand-new wall.

Combining the order book with other data

Filled trades: DeepDom's large-trade bubbles show who is acting, not just who is waiting.
Liquidations: the liquidation-pool layer shows where positions could be forced out; see also crypto liquidations.
Whales: compare with whale positions on the Hyperliquid whale tracker.
Price structure: the book confirms support and resistance on the chart; it does not replace it.

When the chart gets too busy, press ✨ Clean next to the fullscreen button: candles stay on top and only the nearest walls and price tags per side remain.

If you prefer automatic entry signals to reading the book yourself, Crypffalo Trade Copilot scores LONG setups and messages you on Telegram.

FAQ

If bids are thicker, will price go up?

Not necessarily. Resting orders can be pulled, while price follows real fills. Read the book together with CVD and price structure.

Why does DeepDom only show the order book for some coins?

Recording the book every second is resource-heavy, so DeepDom records it for a set of coins. Other coins still have fills, liquidations and money flow.

Which timeframe should I read the book on?

Beginners should start on 15-minute or 1-hour charts. The 1-minute chart changes fast and is noisy.

For information only, not financial advice.

Tags: Order book, Heatmap, Order walls, DeepDom, Support and resistance, Beginners

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