Iceberg Order Meaning

A large single order that has been divided into smaller limit orders, usually via an automated algorithm, for the purpose of hiding the actual order quantity. Only a small fraction of the total order-the "tip"-is visible on the public order book, while the rest remains hidden from other market participants.

This strategy is used by institutional traders to minimize "market impact." If a massive sell order were visible all at once, other traders might lower their bids or engage in front-running, driving the price down before the large order could be filled. As each visible portion is filled, the next slice is automatically placed.

Professional traders use sophisticated tools to detect "icebergs" by watching for price levels that seem to replenish liquidity instantly after being hit.

Detecting these hidden orders can provide an edge, as it indicates a significant player is building or exiting a position at a specific price point.