$ETH 8.6 on the 21st at 21:16, Ethereum Key Resistance and Support Levels:

Upper Resistance: 3644 Bollinger Upper Band, 3661, 24h High.

Lower Support: 3553 Bollinger Lower Band, 3542, 24h Low.

Currently, considering that the U.S. stock market opens at 21:30, the following strategies can be referenced:

1. If the price rebounds to the 3600-3610 range, a 20% short position can be established, with a stop loss at 3630, betting on a drop after the U.S. market opens.

2. Place a long order at 3555 with a 30% position, using the Bollinger Lower Band support to bet on a rebound, stop loss at 3538.

3. Break above 3625 to pursue long, target 3660; if it breaks below 3550, pursue short, target 3520.

It is particularly important to note that the current MACD dual lines are sticking below the zero axis and may change trend at any time; all positions must strictly set stop losses to prevent liquidation from a one-sided market.

For friends who are directionless and confused about opening positions, please follow for daily real-time updates on levels and strategies, and continuous updates after the U.S. market opens!