Where to Place a Stop Loss: 5 Methods and Their Trade-offs

A stop loss defines the point where your trade idea is wrong. Place it too close and normal noise knocks you out. Place it too far and each loss is larger than it needs to be. There is no perfect method, but some are clearly better than others.

1. Structure-based stops

Place the stop beyond a level that, if broken, invalidates the idea: below support for a long, above resistance for a short, below the low of the breakout candle, below a swing low.

• Pros: The stop is tied to a reason. If it is hit, the setup has failed.
• Cons: Obvious levels are where many stops sit, and price sometimes sweeps them before reversing. Placing your stop a little beyond the level helps.

See support and resistance.

2. Volatility-based stops

Set the stop a multiple of the average true range (ATR) away from entry, for example 1.5 or 2 ATR.

• Pros: Adapts to how much the instrument moves. A volatile stock gets a wider stop.
• Cons: Ignores chart structure unless you combine the two.

See ATR stop loss.

3. Percentage stops

Exit if the price falls a fixed percentage, such as 5% or 8%, below entry.

• Pros: Simple.
• Cons: Ignores both structure and volatility. 5% is a huge move for a utility stock and a normal hour for a volatile small cap.

4. Time stops

Exit if the trade has not worked after a set time, such as 30 minutes for a day trade or 10 days for a swing trade.

• Pros: Frees capital and attention from trades that are going nowhere.
• Cons: Best used alongside a price stop, not instead of one.

5. Indicator stops

Exit on a close below a moving average, or when an indicator crosses a threshold.

• Pros: Rule-based and objective.
• Cons: Often reacts late, so the loss can be larger than planned.

Common mistakes

• Choosing the stop by how much you want to lose. Choose the stop from the chart, then set your position size to match your risk.
• Moving the stop further away. It turns a planned loss into an unplanned one. See loss aversion.
• No stop at all, "because I will watch it".
• Stops too tight for the instrument's normal movement.

Check your stops with data

Your journal can tell you whether your stops are too tight. Look at MAE, the furthest a trade moved against you: if many stopped-out trades then went on to your target, your stops may be inside the normal noise. TradeThink records your planned stop on each trade and shows the price chart with your entries and exits, so you can review exactly where the stop was hit.