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 attaches a protective stop on entry so your risk cap is live from the start.