Bitcoin's 4-hour Bollinger Bands are opening downwards, with the price running along the lower band. The middle band at 61500 forms a strong intraday resistance level. The MACD lines are both extending downwards synchronously, with green bars steadily increasing in volume and no bullish divergence structure. The short-term rebound is merely a correction within the downtrend continuation, and the overall bearish main trend is difficult to change.