Stop market

What it does: when price reaches the trigger level, submits a market order immediately at the best available price.

Typical use: stop-loss exits or breakout entries when fill certainty matters more than price control.

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

Tradeoff: highest fill certainty, but slippage is possible in fast or thin markets.

Example: long btc-usdc at 60,000; set stop market trigger at 59,500; when price falls below 59,500, a market sell is submitted to close the position.