Yesterday, it was mentioned that Bitcoin and Ethereum can be shorted. Bitcoin surged yesterday, testing resistance at 778 before falling back. The daily and 4-hour charts show that the price broke below short-term moving average support, with moving averages in a bearish alignment, confirming a short-term downtrend. For short-term rebounds, watch the 770 resistance level; if the rebound is weak and cannot break through, consider short positions accordingly, with short-term targets around 750 to 738. ETH lost the 2297 moving average support, with increased risk of breaking below 2249 and 2200 support levels, indicating a bearish bias. Bullish momentum is waning, with the Bollinger Band middle band at 2315 providing significant resistance, and the price facing downward pressure; the lower band at 2209 offers only short-term support, and a break below could target 2150. The 4-hour moving averages are in a bearish alignment, with support at 2288 failing, dominated by bears. The Bollinger Bands are opening downward, with the price moving along the lower band; support at 2232 is limited. The rebound faces resistance at 2305, and the bearish trend continues until stabilization occurs.