Yesterday early morning, Bitcoin briefly retraced from 91,425 down to the support level of 90,500, then quickly rebounded. However, the overall trend entered a narrow range around 91,200, with the market pace slowing down and no effective volatility forming.

From a technical perspective, the four-hour chart shows the price repeatedly oscillating within the Bollinger Bands from the middle to the lower band. Although there was a rebound after testing the lower band, the bullish momentum is clearly insufficient, and the rebound appears quite weak, with no sign of a trending upward movement. Looking at the hourly chart, when the price attempted to challenge the upper Bollinger Band, it faced strong selling pressure. The upward momentum has already weakened significantly, indicating a high probability of a subsequent pullback or decline.

In terms of trading strategy, it is recommended to closely monitor the bullish support levels above. If a breakout cannot be achieved, consider short positions accordingly. Specifically, for Bitcoin, consider shorting in the 91,000-91,500 range with targets around 89,500-90,000; for Ethereum, short in the 3,120-3,140 range with targets at 3,000-3,080.