Based on the four-hour chart, BTC surged to a high of 82,828 before encountering resistance and pulling back, forming a long upper shadow candlestick, indicating that bullish momentum is overextended and a bearish trend has taken shape. The subsequent price continued to weaken, although it experienced a slight rebound and correction at the low of 79,137, but overall this is a weak rebound after a decline, not a reversal signal. Currently, the price has rebounded to around 80,500, with obvious resistance above, and the rebound volume is weak. The highs are continuously moving lower, so short-term rebounds are an opportunity for a bearish setup, and the market is likely to continue downward in the future.