Stop Limit Order vs Stop Market Order: Key Differences
The main difference between a stop limit order and a stop market order is what happens after the stop price is triggered. A stop market order becomes a market order and fills immediately at the best available price. A stop limit order becomes a limit order and only fills at your specified limit price or better, which means it might not fill at all.
How Each Order Type Works
A stop market order has one price: the stop price. When the market hits $50 on your sell stop, it becomes a market order and executes right away. You are guaranteed a fill, but not a specific price. In fast markets, slippage can mean your actual fill is a few cents or even dollars away from your stop.
A stop limit order has two prices: the stop price and the limit price. When the market hits your $50 stop, the order activates as a limit order at your limit price (say $49.50). You will only sell at $49.50 or higher. If the price drops past $49.50 before your order fills, it stays open and unfilled.
When to Use Stop Market Orders
Stop market orders are your best choice when getting out of a trade matters more than the exact price. Use them for stop loss protection on day trades where you need guaranteed exits. Most prop firm traders rely on stop market orders because missing an exit can blow through daily loss limits and end a funded account.
If you are trading highly liquid instruments like ES futures or major forex pairs, slippage on stop market orders is usually minimal.
When to Use Stop Limit Orders
Stop limit orders work well in situations where you want price protection more than guaranteed execution. They are useful for swing trading entries where you want to buy a breakout but refuse to chase it above a certain price.
They also help in lower-liquidity markets where a market order could fill at a wildly unfavorable price. Just remember: your order might not fill at all, leaving you in a losing trade with no protection.
Which Should You Choose?
For risk management and exits, stop market orders are generally safer. For entries where you want price control, stop limit orders give you more precision. Many experienced traders use stop market orders for all exits and stop limit orders selectively for entries.
Key Takeaways
- Stop market orders guarantee execution but not price
- Stop limit orders guarantee price but not execution
- Use stop market for protective stops where getting out matters most
- Use stop limit for entries where you want price control
- In liquid markets, the difference between the two is often minimal
Frequently Asked Questions
Can a stop limit order leave me stuck in a losing trade? Yes. If the market gaps past your limit price, the order will not fill, and you remain in the position. This is the biggest risk of using stop limits for exits.
Which order type has less slippage? Stop limit orders have zero slippage when they fill, because they only execute at your limit price or better. Stop market orders can experience slippage in fast or thin markets.
Do all brokers offer both order types? Most modern brokers and trading platforms support both. Check your platform’s order entry options or contact support if you do not see stop limit orders available.
Risk Disclaimer: Trading involves substantial risk of loss. Past performance is not indicative of future results. See our full risk disclaimer.