Buy wall vs sell wall
A buy wall is unusually large bid size waiting at one price in an order book. A sell wall is large ask size. Bids normally sit below the current price and asks above it. The size is displayed interest, not a completed trade: an exchange price level can combine orders from several traders, so a wall does not identify one whale.
The live box takes the largest current BTC bid and ask by USD size across the tracked Binance and Bybit perpetual books. Each side can come from a different exchange. Standing time measures how long the recorder has observed that level qualifying as a wall; it is not the age of an individual order.
How this site's wall recorder defines a wall
The live order-book walls page uses this definition:
The biggest single limit orders resting within ±3% of price in the Binance and Bybit perpetual-futures books of the top 10 coins by open interest. A wall is one price level holding at least $1M and at least 5× the typical level near price. Each is tracked from minute to minute: how long it has stood, and whether it was pulled before price got there or consumed when price traded into it.
That is a single price level, unlike the total depth across a price band on BTC's depth page. The public APIs return a limited number of levels. The observed book can end well inside the search range, especially for BTC: no wall observed does not mean no liquidity exists further away.
Reading walls on an order-book heatmap
On the BTC liquidity heatmap, time runs horizontally and price vertically. Colour represents resting USD liquidity in price bins. A large level that persists can make a bright horizontal band below price (a bid wall) or above price (an ask wall). Several levels can share a heatmap bin, so a bright band is not necessarily one wall from the tracker.
Read the timestamp, venue coverage, distance from price and duration together. A band that ends only tells you displayed liquidity changed. Grey areas lie outside the returned book and are unobserved, not empty. A liquidation heatmap is different: it models possible forced-close levels rather than measuring resting orders.
Pulled vs consumed: why walls disappear
Pulled means the recorder no longer sees a qualifying wall while price is still away from its level. Orders may have been cancelled, reduced or moved. Consumed means the wall disappeared as price reached or came close to its level. It is a snapshot classification, not confirmation that the full displayed size traded.
A level can stop qualifying because its size drops below the threshold. Moving outside the observed book or tracking range can also end observation without producing a pulled or consumed outcome. The live counts cover recorded ended walls across all tracked coins, not only BTC. Pulled share divides pulled by pulled plus consumed; when the retained event list fills, the box reports the shorter available window instead of claiming a full day.
Books are snapshotted once a minute, so walls that live for less than a minute are never seen: this is not a spoofing detector, and a wall price touched and bounced off between two snapshots counts as pulled. Resting orders can be cancelled at any moment. Not financial advice.
What is spoofing in crypto?
Spoofing is placing orders intended to be cancelled before execution, creating a misleading impression of supply or demand. For example, someone might display a large bid to make buying interest look stronger while intending to remove it rather than let it fill. The key is intent when placing the order, not size alone. The CFTC's disruptive practices guidance describes that distinction.
This site cannot identify spoofing from one-minute snapshots. A pulled wall is not proof of spoofing. Legitimate traders cancel orders when prices, inventory or risk change. Fast orders may appear and disappear entirely between snapshots. Pulled share measures observed wall outcomes, not manipulation, fraud or a spoofing rate.
Walls are not support or resistance guarantees
A bid wall may look like support and an ask wall like resistance, but either can be removed before price arrives. Aggressive orders can trade through it; size can replenish or shift to another price. A long standing time does not guarantee a future fill or a bounce. Compare displayed depth with executed BTC trades and the actual price path, and treat every wall as a changing observation rather than a trading signal.
Sources and methodology checked on 22 October 2026: Binance: futures order-book API · Bybit: order-book API · CFTC: disruptive practices guidance (spoofing definition) · SwoleCharts: wall recorder methodology. Not financial advice.