Evening ETH trading strategy on August 21:

From the 4-hour chart, ETH is currently at the tail end of a volume increase in an upward trend. Generally speaking, the volume increase at the tail end of a wave pattern tends to be weak, and it is likely to show a "step back" washing out pattern afterwards.

After a pullback in yesterday's market, although there was a quick surge in the morning today, the hourly chart subsequently formed a large bearish candle, entering another pullback correction phase. This round of adjustment is centered around the local high point of 4400. Considering the current large volatility base, it is difficult to accurately predict the short-term adjustment space.

In the evening, short-term operations should focus on the support area: if support can be maintained in the range of 4230-4190, consider setting up long positions based on this range; if this support area is effectively broken, then it is necessary to timely adjust the trading strategy and respond cautiously.