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Partial Scale-Outwhat it buys, and what it costs

Evidence: WeakBeginnerExit · Position management

Take half off at a modest multiple, move the stop to break even, let the rest run. It is probably the most widely used management rule in retail trading and it is worth being precise about what it does.

It lowers expectancy. Not might — does. You are removing size from exactly the trades that were working, which is the opposite of what maximises return. What it buys is a higher hit rate, a smoother curve and a much easier trade to hold, and for a real person managing real money those are not nothing.

The mistake is not using it. The mistake is using it while believing it improves the numbers.

This page is an exit method, not a trade. Attach it to any entry in the library and test the pair together — an exit tested against one entry tells you almost nothing about how it behaves with another.

Applies to
Any entry, though the cost is highest on trend entries
Timeframe
Any
Best suited to
Traders who cannot hold a full position through a drawdown — which is most of them, honestly
Worst suited to
Low-hit-rate trend systems whose return is concentrated in a handful of trades
Tools
The entry, the stop, and a rule for where the first part comes off

Valid setup

EX-04 · PARTIAL SCALE-OUT — THE SAME TRADE, EXIT FOUR EURUSD · H1 · half off at 1R, stop to break even, the rest trailed — smoother, and worth less LONG 1.0791 1.0827 1.0864 1.0901 1.0938 1.0974 1.1011 half off here remainder — worst case now break even 1R — only until the partial EMA(20) — the remainder's trail PARTIAL = 1R, half the position ENTRY — and the stop moves here after the partial INITIAL STOP 1 2 3 4 1.0851 1.0842 1.0833 ① Full size on, normal stop ② 1R reached — half off, stop to entry ③ Break even is inside the noise. Know that. ④ Remainder trails and exits later ⑤ Total result is smaller than holding full size ⑥ You bought comfort. Price it honestly

Exact rules

When it applies

  • Use it when the psychological benefit is worth the expectancy cost, and be explicit with yourself that this is the trade you are making.
  • First exit at a fixed multiple — 1R is the common choice — for a fixed fraction, usually a third or a half.
  • Move the stop to break even at that point and not before. Moving it early is the version of this that quietly destroys the strategy.
  • The remainder uses one of the trailing methods in this book. Scaling out and then holding the rest without an exit rule is not a plan.

If it goes wrong

  • The initial stop is unchanged — the scale-out does not let you risk more at entry.
  • After the partial, the position is at break even, so the worst case for the trade as a whole is a small win rather than a full loss. That is the real benefit and it is worth naming.
  • Break even is not free: a stop sitting exactly at entry is inside the noise, and a meaningful share of trades will be taken out there before continuing.

The exit rule

  • First tranche at the fixed multiple. Remainder trailed.
  • Test the same entry with and without the scale-out. If the full-size version has a materially higher expectancy — and it usually will — you now know what the comfort is costing you per year.
  • Never scale out of a losing position. That is not this rule; that is hoping.

Build Partial Scale-Out

Reading this page is free and always will be. Taking it is what costs — the complete MQL5 for the rules above, yours to keep, permanently. Five of them cost $10 and they never expire.

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Trading carries risk and most retail accounts lose money. Nothing on this page is financial advice or a recommendation to trade. The chart is an illustration of the rules on constructed candles — it is not a record of a trade and not a backtest.