A EURUSD long is up 12 pips, the stop is still at breakeven, and the trader stares at the screen with no plan beyond a vague sense that it should probably keep going. That vague sense is not a management plan, it is improvisation with money attached, and improvisation is exactly where good entries turn into mediocre or losing trades. Every open position needs a decision tree built before entry, not invented while the position is live and the trader's judgment is already compromised by having money on the line.
The four live outcomes
Once a position is open, only four things can happen next, and a plan should specify the response to each before the trade is even entered. Hold means the trade is behaving as expected and the original stop and target remain correct, no action needed. Trail means the trade has moved far enough in profit that locking in some of it by moving the stop makes sense without abandoning the original target. Partial means taking some of the position off at a first level while letting the remainder run toward a further target. Kill means the trade has invalidated its own premise, not just moved against you, and closing it now is better than waiting for the stop to do it later.
Deciding to hold or trail
Hold is the default and should stay the default unless a specific condition is met, not whenever the trade merely looks good. A common trailing rule: once the trade reaches one times the initial risk in profit, move the stop to breakeven, removing the possibility of a winner turning into a loser. Beyond that, trailing behind a clear structural point, a new higher low on a long, a new lower high on a short, keeps the stop tied to the market's own behavior rather than an arbitrary distance that ignores what price is actually doing.
Deciding to take a partial
Partial exits suit trades where the first target is a real, marked level and the setup has room to run further beyond it. Selling half a Nasdaq long at a first resistance level while leaving the rest with a trailing stop toward a second target banks a partial win and reduces the emotional stake in the remainder, which often makes the harder decision, trailing the runner through normal pullbacks, considerably easier to execute without flinching.
Deciding to kill it early
The kill decision is the one traders resist most, because it means admitting the trade is wrong before the stop proves it. The tell is a change in the premise, not a change in price: a breakout that stalls and grinds sideways instead of following through, a support level that starts absorbing sellers instead of bouncing, a session that was supposed to trend turning into a range. When the reason for the trade no longer exists, holding it hoping the stop will not get hit is not patience, it is refusing to make a decision that is already obvious.
Writing the tree down before the trade
The whole exercise only works if it happens before entry, on paper or in a trading platform's notes field, not narrated in the trader's head while a live position is moving. Specify the price or condition that triggers each of the four branches at the moment the ticket is built, alongside the stop and target. A decision tree written in advance turns a stressful, improvised moment into a lookup: check the condition, take the pre-decided action, move on.