Recently, Bitcoin's bearish characteristics have become prominent. After effectively breaking below the key support zone of 90000-90700 on the 4-hour chart, this range has officially transformed into a short-term strong resistance. On the hourly chart, consecutive long upper shadow candlesticks appear, MACD has formed a death cross above the zero line, and RSI continues to stay below the 50 level. The resonance of these three technical signals confirms that bearish momentum is continuously accumulating, while the rebound strength remains weak.

Ethereum follows suit and weakens accordingly. After breaking below the previous oscillation upper boundary of 3140-3180, the nature of this region has also changed—from support to resistance. The bearish structure is equally clear, making short-term directional judgment straightforward.

In terms of specific trading strategies, Bitcoin can consider entering short positions around 90800-91500 during a rebound, with targets at 89300-88000. Ethereum can also be shorted around 3140-3170 during a rebound, with targets at 3050-2950. Given the current momentum, a high-altitude shorting approach is more feasible; wait for a rebound opportunity.