How stop loss orders work in general
A stop loss order instructs a broker to act once a security reaches a trigger price. In many implementations, a triggered stop becomes a market order, which means the fill price can differ from the trigger, sometimes materially in fast or thin markets. Some platforms also support stop limit variants, where a triggered stop becomes a limit order that may not fill at all if the market moves past the limit. Gaps at the market open, halts and low liquidity can all cause execution at prices far from the stop level. Long-term investors should understand these mechanics before assuming a stop guarantees an exit price, because it does not.
- A stop trigger price is not a guaranteed fill price; slippage can occur in fast or gapping markets.
- Stop limit orders control fill price but may not execute, leaving the position open.
- Order behaviour around market openings, halts and illiquid sessions deserves special attention.


