Stop-loss vs stop-limit orders: what's the difference?

A conventional stop-loss order becomes a market order when its stop price is reached. A stop-limit order becomes a limit order. The first attempts an exit at available prices; the second places a boundary on the execution price but may leave the position open.

Neither guarantees that a loss stops at the trigger price. The useful distinction is between the event that activates an order and the trade that actually reduces your exposure.

Two prices with different jobs

The stop price is a trigger. Before it is reached, the conditional order has not yet become the market or limit order described in the instructions. The limit price, if present, constrains the price at which the activated order may execute.

For a sell, the limit is a minimum acceptable price. For a buy, it is a maximum. The stop and limit can be different because the trader may allow some movement between activation and execution.

These are general definitions. Product labels, trigger sources, order duration, and execution protections vary by venue.

A sell-stop example

Imagine a trader owns 10 units bought at $100 each. They set an illustrative sell stop at $95. If the trigger is reached and the resulting market order fills at an average of $94.60, the price loss is 10 × ($100 − $94.60) = $54 before fees.

The expected $50 loss at exactly $95 was a planning calculation, not a guaranteed result. If the available price gaps down to $92, the exit can be worse. If only part of the quantity executes, the remaining position still carries exposure.

Now give the order the same $95 stop but a $94.50 sell limit. Once activated, it may execute at $94.50 or higher. If the best available buyers are at $94.20, it cannot sell to them under that limit. The price boundary is respected, but the exposure remains.

On a venue where the activated limit order rests, it may fill later if buyers return at acceptable prices before it expires or is canceled. On a venue using immediate execution, an unfilled remainder can be canceled instead. Check the time-in-force rule rather than assuming every “stop-limit” label means the order will wait.

Buy stops for short positions

Closing a short requires a buy. If a trader shorts at $100 and wants an exit when the market rises to $105, a buy stop may activate there. With a $105.50 buy limit, the activated order cannot pay more than $105.50.

If prices jump to $107, that limit can prevent the exit. Without a limit, execution can occur at a higher price than anticipated, subject to venue protections and available liquidity. The conflict is the same as for the sell example: a tighter price boundary can reduce the chance of getting out.

For the directional mechanics, see long vs short positions.

Which market price activates the order?

A chart's last trade, an index price, and a mark price can differ. Venues choose which reference activates their conditional orders. A wick visible on one chart therefore does not prove that a particular stop should have triggered.

N1's TP/SL specification, reviewed October 11, 2026, uses the index price. A long position's stop loss activates when that index is at or below the trigger; a short position's activates when it is at or above it.

Those orders reduce or close existing perpetual exposure. They do not open or increase a position. On activation, they attempt an immediate reduction, with an optional limit price and size. The documentation does not describe this as a conventional stop-limit that necessarily rests until filled. Liquidity, price constraints, and market state still determine whether execution occurs.

The index vs mark price guide explains why the displayed references answer different questions.

A stop is separate from liquidation

A stop instruction does not reserve collateral or prevent an account from reaching its maintenance threshold. Liquidation may happen before the intended stop exit, particularly when effective leverage is high or other positions reduce account equity.

Even after activation, the conditional order must execute to remove risk. “Triggered” and “closed” are different statuses. If only part fills, check the remaining position rather than treating the submitted quantity as already gone.

Choosing the instruction for the intended exit

Start by deciding which matters more for the scenario: attempting execution promptly or refusing execution beyond a defined price. Neither choice eliminates market risk. A stop-market exposes the exit to available prices; a stop-limit can leave the trade running during a large move.

Then check the operational details: trigger reference, side, quantity, limit, duration, and what happens after a partial fill. If a position is reduced manually, make sure remaining conditional orders still match its size and direction. Where supported, reduce-only behavior helps prevent an exit order from becoming new exposure.

Position sizing should account for the fact that a planned stop distance is an estimate. Slippage explains how actual execution can change that estimate.

Sources

The SEC's order-type bulletin describes conventional stock stop and stop-limit orders; its examples are not a specification for every derivatives venue. Platform-specific details follow the TP/SL and order-type documentation. Prices and calculations here are hypothetical.