A bullish pin bar at the support key level signals a near-term price reversal but what if it appears at the resistance key level..?
It's the weakening of buyers?
Pin bars are like any other chart pattern, in right climate, other patterns, trend line they can be a gem or torture, but risk management makes the profits.
Close above the pin bar's high confirms the market's bullishness. Close below the pin bar's low likewise is a strong bearish indication: again, confirmation next day after the initial bearish close would be worth waiting for.