Market

What it does: executes immediately at the best available price in the order book.

Typical use: fast entry or exit when execution certainty matters more than price precision.

Key parameters: side and quantity (plus reduce-only where applicable).

Tradeoff: highest fill certainty, but slippage can occur in fast or thin markets.

Example: buy 1 BTC as a market order; it fills instantly across available asks until the size is completed.