Stop placement and trailing exits

Prerequisite: Size the risk before the position

On a small screen, scroll the figure sideways or open it full size.

Learning objective

Connect scenario invalidation, position size and a predefined trailing rule.

A stop location should express a defined reason the practice scenario is invalid, not simply the cash amount you wish to lose. Once the price distance is defined, position size converts that distance into planned account risk. Execution costs and possible gaps remain separate uncertainties.

A trailing exit changes the stop according to a rule as price moves favourably. Rules can use a fixed distance, volatility estimate or confirmed structure. Define observation frequency and whether intrabar movement or candle close matters; otherwise an apparently clear rule cannot be reproduced in testing.

Tightening a stop can reduce room for a trend to develop and increase small exits. Widening it increases potential loss unless exposure is adjusted. Moving to the entry price is not automatically cost-free because spreads, commission and financing still count. Compare complete exit distributions, not one successful screenshot.

Common mistakes

Do not label a stop as a guaranteed maximum loss or change trailing rules retrospectively to improve a backtest.

Practice

Apply fixed and trailing exits to the same ten historical practice entries, including costs. Record rule-consistent outcomes and ambiguous intrabar cases.

Sources & further reading

• Investor.gov — Types of Orders
• CME Group — Position and Risk Management
• SEC Investor.gov — Stop, Stop-Limit, and Trailing Stop Orders