Order Book Imbalance
Order book imbalance measures how lopsided the resting liquidity is between the bid side and the ask side of a market. When substantially more size rests on one side near the top of the book, short-term pressure is tilted in that direction. It is a core order-flow metric, informative but easy to manipulate.
How is order book imbalance calculated?
The common form compares bid and ask volume within some depth of the top of book: imbalance = (bid volume − ask volume) / (bid volume + ask volume). The result ranges from −1 (all resting size is on the ask side) to +1 (all on the bid side), with 0 meaning balance. Every implementation must choose how many levels or how much price distance to include, and whether recent levels weigh more than distant ones — choices that change the number meaningfully, which is why an imbalance figure is only interpretable alongside its measurement window.
What does order book imbalance signal?
A persistent tilt toward the bid side means buyers are willing to rest size close to the price while sellers are not — conditions under which upticks meet little resistance. Research on limit order books generally finds imbalance carries short-horizon information about the direction of the next price moves. Two cautions temper this in crypto: resting orders can be spoofed — placed to create the appearance of pressure and cancelled before execution — and a snapshot imbalance is noisy. Sustained imbalance, confirmed by actual trades consuming the thin side, is far more meaningful than any single reading.
Depth imbalance and spread behaviour are among the order-book measurements the VolumeCatcher scanner tracks across Binance Spot pairs in real time.
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Volume Catcher is an analytical tool, not financial advice. Trading digital assets involves substantial risk of loss. Past performance of signals does not guarantee future results. You are solely responsible for your execution decisions and for complying with the laws of your jurisdiction.