A trader enters ASX momentum stock at $2.00. Stop at $1.80 — risk is $0.20 per share, 500 shares, total risk $100. Price hits $2.40. Anxiety spikes. They exit the entire position at $2.40 for $200 profit — a clean 2R. Then the stock runs to $3.60. That's 8R abandoned. This is the real cost of binary thinking.

Most traders treat exits as a single decision: in or out. That framing forces an impossible choice between protecting paper profits and capturing full trend moves. The traders interviewed in Market Wizards — particularly Ed Seykota and Paul Tudor Jones — consistently describe exits as a process, not an event. Scaling out is that process formalised into rules.

CONCEPTScaling out splits one exit decision into multiple smaller decisions — each triggered by objective price levels, not emotion.
WARNINGTaking partials too early or too large locks in mediocre R multiples and statistically destroys positive expectancy over time.
KEY IDEAA runner is only a runner if your rules protect it — move the stop on remaining units as each partial is taken.

A rules-based partial exit framework works on fixed R targets. Entry at $2.00, stop $1.80 = 1R = $0.20. Exit Unit 1 (40% of position) at 2R ($2.40). Move stop on remaining 60% to breakeven ($2.00). Exit Unit 2 (30%) at 4R ($2.80). Trail stop on final 30% with a 2R trailing stop. That final unit can now capture an 8R, 10R, or 15R move with zero initial capital at risk.

Scaling Out: Position Size vs R Multiple100%60%30%0%Entry2R Exit4R ExitRunner100%-40%-30%

The mathematics justify the approach. Taking 40% off at 2R and 30% at 4R generates 2.0R in locked gains before the runner is even considered. If the runner hits 8R on the remaining 30%, total trade return equals 3.6R — nearly double what a full exit at 2R would have delivered. Risk-reward ratio analysis confirms this mathematically; even if the runner stops out at breakeven, the partial exits still produce a profitable trade. The mechanics of trailing stop orders are the operational tool that protects those runners automatically, removing discretion entirely. For deeper context on how systematic traders apply these concepts across full systems, trend following methodology literature documents decades of application across multiple asset classes.

Rules eliminate the anxiety. If the exit ladder is defined before entry, there is nothing to decide mid-trade — only levels to execute.

This content is for educational purposes only and does not constitute financial product advice. Past performance is not indicative of future results. Profit Logic Ltd (ACN 688 669 936) accepts no responsibility for errors or omissions in this content or anywhere on this website. Always seek advice from a licensed financial adviser before making investment decisions.