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Trading term

Market order

An order to trade immediately at whatever price is available.

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By the Orca Crypto teamUpdated 2026-09-06How we check this3 min readDefinition
Definition

An order to trade immediately at whatever price is available.

A market order guarantees execution but not price. It walks up or down the order book consuming whatever liquidity it finds until it is filled.

In a deep market the difference is negligible. In a thin one, a market order can cost you far more than you expected.

In practice

Never use a market order on an illiquid token. You may fill several percent away from the quoted price.

What people get wrong

That a market order gets you the market price. It gets you whatever is available, which in a thin book can be far worse than the price on the screen. On anything illiquid, a limit order costs you patience and saves you real money.

Common questions

When should I use a market order?
When getting filled matters more than the exact price: exiting something moving against you, or trading a pair liquid enough that the spread is trivial.
Why did my market order fill at a bad price?
It takes whatever is available, walking up or down the book until the whole order is filled. On thin liquidity that walk can be a long way from where you clicked.

Where this comes up on the site

The guides that actually use this word, rather than a list of everything we have written.

Where to go next

More trading terms

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