When Your Bias and the Gap Disagree

Yesterday you leaned bullish into the close. This morning the index gaps down through your key support. The instinct is to defend yesterday's read or flip instantly bearish. Neither reaction is useful without a short checklist.

Question one: Is the gap holding or filling?

A gap that holds for the first fifteen minutes tells a different story than one that fills before the open. Mark the gap fill level on your chart and note the time. Filling early often means yesterday's structure still matters; holding suggests overnight participants have a different conviction.

Question two: Did volume confirm the move?

Thin overnight volume on a large gap is a warning sign — the opening bell may reverse the move quickly. Compare overnight volume to a ten-day average. Write "thin / average / heavy" next to your gap classification.

Question three: What would prove you wrong either way?

Instead of choosing a side immediately, define two invalidation points: one if you stay with yesterday's bias, one if you follow the gap. The first hour becomes a test, not a guess. This is the discipline we rehearse in weekly bias circles — participants share these dual invalidation levels aloud before the bell.