The stop loss is the most important order you will ever place. Set it too close and normal price fluctuation stops you out before the trade has a chance. Set it too far and one bad trade takes a huge chunk of your account. The right stop loss is not about how much money you are willing to lose. It is about where the trade thesis becomes invalid.
The Core Mindset Shift
Your stop loss is not a financial decision. It is a technical decision. You are not asking how much you are comfortable losing. You are asking: at what price level does the setup I identified stop making sense? That level is your stop. Then you size your position so that hitting that stop costs an acceptable amount of your account.
Stop placement drives position size, not the other way around. Find the right stop level first, then calculate how many shares or contracts you can trade to keep the loss within 1-2% of your account.
4 Methods for Finding Your Stop Level
Place your stop just below the last significant swing low for longs, or above the last swing high for shorts. If price returns there, the market structure that defined your setup has broken.
For trend-following trades, place your stop below a key moving average like the 20 EMA or 50 SMA. A close below the MA signals the trend has changed.
The Average True Range measures how much an asset typically moves per candle. Using 1.5 to 2x ATR as your stop distance ensures the trade has room to breathe without excessive risk.
Support and resistance levels that have held multiple times are strong stop anchors. Place your stop just beyond these levels.
Visualising a Structure-Based Stop
The 3 Biggest Stop Loss Mistakes
- Placing the stop at a round number — market makers know stops cluster there. Offset slightly from obvious levels.
- Moving your stop wider when price gets close — if price is approaching your stop, the market is telling you something. That is not a mistake, that is information.
- Using the same percentage stop for everything — a 2 percent stop on a blue chip is completely different from a 2 percent stop on a volatile crypto. Adjust for the asset.
Never move your stop wider to give a trade more room. You can trail a stop in your favour as a trade goes well. You never move it away from entry. If you feel the urge to do this, your position size is too large — that is the real problem to fix.
Trailing Stops: Protecting Profits
Once a trade moves significantly in your favour, trail your stop to lock in gains. A simple method: each time price makes a new high for longs, move your stop to just below the new swing low that forms during the pullback. This keeps you in the trend while protecting profits already made.
ScarX gives you stop loss levels automatically
Every strategy analysis on ScarX includes a calculated stop loss based on the investor framework. No guesswork, just clear levels from the actual trade setup.
Try it free