A stop order (stop-loss) becomes a market order once a trigger price is hit — used to automatically cut a losing trade. It’s the mechanism behind a hard stop.

How it works

You set a trigger (stop) price. When the market trades there, your stop activates as a market order and fills at the next available price. For a long option, you’d place a sell stop below your entry — if the option drops to your level, it triggers and exits you. It executes without you watching, which is exactly the point.

The key limitation

Because a triggered stop becomes a market order, it fills at the next available price, which in a fast or gapping market can be well beyond your trigger (slippage). So a stop caps your intended loss but can’t guarantee the exact exit price. A stop-limit adds price control (but risks not filling at all).

A stop order is a promise to exit, not a promise of price. It fires when you’re wrong — then takes whatever the market offers next.

The takeaway

Stop orders enforce your exit automatically — essential on fast 0DTE where mental stops fail. Size for possible slippage (worst case). NoVo’s dealer map shows where the structure sits, so the stop you place at your broker can sit at a level that actually means something.