I am going to go out on a limb and say that no matter whether it's an indicator or price or order flow, etc. patterns dictate sentiment, the larger the time frame, the bigger the outcome. Only policy interventions or absence of players (liquidity) will negate patterns reinforce positive or negative sentiment. I think we will agree that nobody in their right mind likes to lose money or turn down opportunity to profit, patterns confirm sentiment in a high liquidity free market. That is my belief based on personal experience.
Actually it's the behavior that has created and continues to create the pattern that illustrates the sentiment. If one trades the pattern alone without considering the behavior that created it, he will likely trade it incorrectly, e.g., the ubiquitous "head and shoulders".