Generally, two consecutive market periods tend not to duplicate their behavior. Differences can be overt in their opposite direction, or subtle in their different slope in the same direction. One window can range while the other trends.
Also, an alternation rule often applies to a session’s two bias windows, which can anticipate afternoon price action to behave with specific characteristics depending on the morning window’s behavior — so, a setup that expects afternoon trending would also suggest taking greater exposure and allowing wider stops.