Does a stop-loss guarantee I never lose more than planned?

No. A stop-loss order can still be missed during a fast-moving market or an overnight price move. This tool models the more common case where a stop meaningfully caps losses during regular trading hours, and links to a separate overnight stress-test calculator for the overnight case specifically.

Home/Trading Tools/No-Stop-Loss Habit Simulator

Risk Management Tools

What does trading without a stop-loss actually cost me compared to always using one?

Q: What does trading without a stop-loss actually cost me compared to always using one?

Enter your number of simulated trades, win rate, average winner, average planned loss, and how often a losing trade without a stop turns into a bigger runaway loss along with its average size. The simulator compares total profit and loss between always using a stop and trading without one.

Most traders blow up chasing the setup they missed, not the one in front of them.

Jason Parker, Founder of Trading Habits

Enter Your Trade Stats

Pull these numbers from your trade journal, or make a reasonable estimate to see the shape of the comparison.

Your Result

Fill in the fields on the left and click Simulate to compare always using a stop against skipping it.

How this is calculated

Scenario A assumes every losing trade is closed at your average planned loss, as if a stop-loss or an equally disciplined manual exit is used every time.
Scenario B keeps the same win rate and average winner, but assumes the percentage of losing trades you specify turn into a bigger, runaway loss instead of your planned loss size, since there was no stop in place to cap it.
The dollar difference shown is Scenario B's total profit or loss minus Scenario A's, so a negative number means skipping stops cost money over the simulated trades.
A stop-loss order can still be missed by a fast-moving market or an overnight move, so using one is not an absolute guarantee against a loss larger than planned. This tool models the more common case where a stop meaningfully caps the size of a loss during regular trading hours.
This is a modeled comparison based on the frequency and size assumptions you enter, not a guarantee that any specific number of your future losses will run away.

Risk & liability disclaimer: This calculator performs a modeled comparison based on the win rate, loss sizes, and runaway-loss frequency you enter. It does not guarantee any trading outcome and does not claim that a stop-loss order always prevents a loss beyond the stop price. It is not financial advice. Trading involves risk of loss. Trading Habits is not a broker-dealer, registered investment adviser, or tax professional, and is not affiliated with any broker, exchange, or data provider. Always verify results independently before making a trading decision.

What does trading without a stop-loss actually cost me compared to always using one?

Enter Your Trade Stats

Your Result

How this is calculated

More Trading Tools