L3.3 — Partial Exits and Trail Stops Without Destroying Expectancy

Partial exits — closing a portion of the position at a key level and trailing the remainder — are a valid management technique when used systematically. The problem arises when partial exits are used reactively: closing half the position because the trade is in profit and anxiety is building, rather than because a defined structural level justifies it.

The rule for partials: define the exit level in advance, at a clear structural reason (resistance zone, prior high, session high). Close the defined percentage at that level. Trail the remainder using a structural stop (below the most recent swing low for a long). Do not change the percentage or the level reactively during the trade.

The impact on expectancy: every time you close a partial at a level below your original target, you reduce the average reward of your winning trades. Track this explicitly. If your average actual R:R on winners is 0.8:1 despite targeting 1:2, your management process is reducing your edge. This is data — use it to adjust your rules.