Scaling

Scaling means building or exiting a position in stages rather than all at once. Instead of buying (or selling) your full intended size in a single order, you break it into smaller pieces and add to it — or trim it — over time or as the price moves.

There are two common flavors. "Scaling in" means starting with a partial position and adding more as the trade develops, either because the price is moving in your favor and confirming your idea, or because it has pulled back to a level you consider more attractive. "Scaling out" is the reverse: taking profits (or cutting losses) gradually by selling part of the position at one price, more at another, rather than closing everything in one shot.

The nuance that trips people up is the difference between scaling in on a pullback and simply averaging down out of hope. Scaling in is a deliberate plan, decided before the trade, with defined levels and a maximum size you're willing to hold. Adding to a losing position because you don't want to admit you were wrong, with no predetermined limit, is a different and much riskier behavior even though it can look identical on a chart. The size of each addition and the total cap on exposure are what separate a scaling strategy from account-blowing improvisation.

Scaling also applies to exits: a trader might sell a third of a winning position at a first target, another third at a second target, and let the rest run with a trailing stop, rather than guessing the single best exit point.