Cryptopedia · Market microstructure

Order-flow imbalance

Order-flow imbalance measures the net pressure of aggressive market orders — whether buyers or sellers are the ones crossing the spread to get filled. It reads the market's short-term intent from executed flow rather than resting orders.

What it is

Every trade has a passive side (a resting limit order) and an aggressive side (a market order that lifts or hits it). Order-flow imbalance nets the aggressive buying against the aggressive selling over a window. A positive imbalance means takers are lifting offers; a negative one means they are hitting bids.

Why it matters

Resting liquidity shows intent that can be cancelled; executed flow shows conviction that has already paid the spread. Sustained one-sided imbalance tends to move price, and a divergence — price flat while imbalance builds — can flag absorption by a large passive participant.

How to read it

Read imbalance beside the order book and price, not alone. Aggressive buying into thinning offers is a momentum condition; aggressive selling absorbed by a steady bid is the opposite. It is a short-horizon lens — noise dominates on the smallest windows.

Order-flow imbalance — FAQ

What is the difference between order flow and the order book?

The order book is resting liquidity waiting to trade; order flow is the stream of trades that actually executed. Imbalance is computed from executed flow — the aggressive side of each trade.

What does a positive order-flow imbalance mean?

It means aggressive buyers dominated — takers were lifting offers to get filled, a short-term sign of buy-side pressure.

Does order-flow imbalance predict price?

It describes short-term pressure, not a forecast. Sustained imbalance tends to move price, but it is best read with the order book and price behavior, and it is noisy on very short windows.

What is absorption?

Absorption is when heavy aggressive flow on one side fails to move price because a large passive order keeps refilling — often a sign that a bigger participant is taking the other side.

Order book & liquidity depth

The order book is the live ledger of resting buy and sell orders. What bid/ask, spread, depth and slippage mean, and why visible liquidity can move or vanish.

Liquidation cascade

A liquidation cascade is a self-reinforcing chain of forced liquidations that accelerates a price move. How it forms, why leverage fuels it, and how to spot the setup.

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