Scaling Out of Profits with Trailing Stops
Quick Tip
A trailing stop-loss allows you to capture the maximum move of a trend while protecting your accumulated profits.
Imagine you're up 20% on a NVIDIA trade. You're feeling great, but then the price dips, and suddenly you're watching your gains evaporate because you didn't have an exit plan. This is where trailing stops come in—they're a tool designed to lock in profits while letting a winning trade run.
What is a Trailing Stop Loss?
A trailing stop loss is an order that automatically moves a stop-loss price upward as the asset's price rises. It stays a fixed percentage or dollar amount behind the current market price. If the price reverses and hits that level, the order triggers a sell. It's a way to protect your downside without manually babysitting a screen all day.
Most brokers, from Fidelity to Charles Schwab, offer these as standard order types. You can set them as a percentage (like 5%) or a fixed dollar amount. I've seen traders lose massive portions of their gains because they waited for a "feeling" rather than a mathematical trigger.
How Do You Choose Between Percentage and Dollar Trailing Stops?
You choose based on the volatility of the specific asset you're trading. A fixed percentage works well for steady blue-chip stocks, while a dollar-amount stop might be better for highly volatile options or small-cap stocks. If you don't account for volatility, you'll get stopped out prematurely by normal market noise.
I often recommend looking at the Average True Range (ATR) to decide how much "room" to give a trade. If you want to get technical, check out my previous post on using ATR to set smart stop losses to avoid getting shaken out too early.
| Method | Best For | The Downside |
|---|---|---|
| Percentage-Based | Stable, trending stocks | Doesn't account for sudden spikes |
| Dollar-Based | High-volatility assets | Can be too tight during flat markets |
| ATR-Based | Dynamic market conditions | Requires more manual calculation |
Can a Trailing Stop Protect You from a Total Loss?
Yes, but it isn't a magic shield. A trailing stop only works if there is enough liquidity in the market to execute your order at your price. During a "flash crash" or a massive gap down at the market open, your stop might trigger much lower than you intended. This is a hard lesson I learned the hard way on the floor—the market doesn't care about your exit plan.
Always remember that a trailing stop is a defensive tool, not a profit-maximizing one. It's about survival. If you're looking to refine your entry timing before you even worry about the exit, read about improving your timing with VWAP.
Don't get greedy. If the trend breaks, get out. Even if you're "almost" at your target, the trailing stop is there to make sure you don't turn a winner into a loser.