An expiration diagram answers one date. If you plan to close after ten days on a 30-day trade, you need a ten-day valuation question.
Preserve the remaining time value
Before expiration, each leg can retain time value. A spread that would pay a certain amount at expiration may be worth less—or occasionally behave differently—at an earlier date. The underlying price, remaining days, implied volatility, rates, dividends and skew all influence the exit.
Therefore “the stock reached my strike” does not uniquely determine the position value. Use a dated scenario grid and mark its volatility assumption.
Separate triggers from forecasts
A profit target or loss limit is a rule, not proof that the market will trade at that value. A closing order may not fill at the modeled midpoint. Stops on options can be especially sensitive to spreads and fast markets. Model several net exit prices and include fees and slippage.
Event timing matters: holding through earnings, an FOMC decision or a dividend date can change the risk from the original ordinary-market scenario.
Document the decision
Before entry, record the earliest review date, planned exit date, target, maximum acceptable loss, invalidation condition and what data must be refreshed. After closing, preserve actual fills and whether the structure changed. This creates evidence that can later test the rule without rewriting the original forecast.