Knowing when you will exit a trade is just as important as knowing when to enter. Stop orders are one of the most common tools investors and traders use to limit losses or protect gains – yet many beginners do not understand the difference between a stop-loss (stop-market) order and a stop-limit order until one behaves unexpectedly. This guide explains stop-loss vs. stop-limit orders, how each works, and the common mistakes to avoid.
Try it: use our free Position Size Calculator to work out how many shares to trade based on your stop.
First, the Two Basic Order Types
- Market order: buy or sell immediately at the best available price. Execution is almost certain in a liquid market, but the exact price is not.
- Limit order: buy or sell only at a specified price or better. The price is controlled, but the order may never be filled.
Stop orders are simply instructions that turn into one of these two order types once a trigger price is reached.
What Is a Stop-Loss (Stop-Market) Order?
A stop-loss order – often called a stop-market or simply “stop” order – sits inactive until the price reaches your stop price. When that happens, it becomes a market order and is executed at the next available price.
Example: You buy a stock at $50 and place a sell stop at $45. If the stock trades down to $45, your stop is triggered and a market sell order is sent. In a normal market you might be filled at $44.95 or $44.90.
Advantages
- Very high likelihood of getting out once the stop is triggered.
- Simple to understand and set up.
Disadvantages
- Slippage: in a fast-moving market, the fill price can be noticeably worse than your stop price.
- Gap risk: if the stock closes at $47 and opens the next morning at $40 after bad news, your stop triggers at the open and you may be filled near $40 – not $45.
What Is a Stop-Limit Order?
A stop-limit order has two prices: a stop price that triggers the order, and a limit price that sets the worst price you are willing to accept. When the stop price is reached, the order becomes a limit order.
Example: You own a stock at $50 and set a sell stop-limit with a stop of $45 and a limit of $44. If the price falls to $45, a limit order to sell at $44 or better is placed. If buyers are available at $44 or higher, you are filled. If the price drops straight through $44, your order may not fill at all.
Advantages
- You control the minimum price you will accept.
- It avoids selling at a very poor price during a sudden, temporary spike down.
Disadvantages
- No guarantee of execution: in a gap or a fast decline, the price may skip past your limit and you remain in the position while it keeps falling.
- Slightly more complex to set up correctly.
Stop-Loss vs. Stop-Limit at a Glance
| Stop-loss (stop-market) | Stop-limit | |
|---|---|---|
| Becomes after trigger | Market order | Limit order |
| Execution once triggered | Very likely | Not guaranteed |
| Price control | None | Yes – limit price |
| Main risk | Slippage and gaps | Not getting filled |
| Often used when | Getting out matters most | Price matters most |
Trailing Stops
A trailing stop moves automatically as the price moves in your favor. For example, a 10% trailing stop on a stock bought at $50 starts at $45. If the stock rises to $60, the stop rises to $54. If the stock then falls, the stop stays at $54. Trailing stops can help protect gains in a trending market, but tight trailing distances are easily triggered by normal volatility.
How Traders Commonly Choose a Stop Level
There is no single correct method, but common approaches include:
- Percentage-based: a fixed percentage below the entry price, such as 5% or 8%.
- Volatility-based: a multiple of a volatility measure such as the Average True Range (ATR), so that normal daily swings do not trigger the stop.
- Chart-based: just beyond a support level, a recent swing low, or a moving average. Our guides to technical analysis and moving averages and RSI explain these ideas.
Many disciplined traders also decide their position size based on the stop distance, so that a stopped-out trade loses only a small, predetermined portion of their account – often 1% or 2%. This connects stop orders to broader risk management.
Common Mistakes to Avoid
- Placing stops too tight. A stop inside the normal daily range of a stock is likely to be hit by noise.
- Moving the stop further away as the price falls. This defeats the purpose of a stop and can turn a small loss into a large one.
- Adding to a losing position to lower the average cost, instead of respecting the original exit plan. See how to handle trading losses.
- Setting a stop-limit with the limit too close to the stop, which makes it likely the order will not fill in a fast market.
- Forgetting about order duration. A “day” order expires at the close; a “good-til-canceled” (GTC) order stays active, sometimes for a limited period set by the broker.
- Ignoring trading hours. Some brokers only trigger stops during regular trading hours, not in pre-market or after-hours sessions.
Stops and Long-Term Investors
Stop orders are most common among active traders. Long-term investors in diversified funds often rely instead on asset allocation and rebalancing to manage risk, because routine market declines could trigger stops and force them to sell near a low. Whether stops suit you depends on your strategy, time horizon, and how actively you manage your portfolio.
Key Takeaways
- A stop-loss (stop-market) order becomes a market order when triggered: it prioritizes getting out, but the price is not guaranteed.
- A stop-limit order becomes a limit order: it controls the price, but the order may not be filled.
- Gaps and fast markets are the main risks for both types.
- Set stops based on a clear method and size positions so a stopped-out trade is an acceptable, planned loss.
Important Disclaimer
The information in this article is for general educational purposes only and does not constitute financial, investment, tax, or legal advice. Tax rules and treaty rates change and depend on your personal circumstances. All investing involves risk, including the possible loss of principal. Consider consulting a qualified professional before making financial decisions. See our full Disclaimer.
