Congratulations to QQQ for regaining its position above the 200-day moving average at 681.7! This rebound was accompanied by increased trading volume, which is a positive sign. However, we cannot yet declare a trend reversal, as there is significant resistance at 698.9. The key factors to watch are: 1. Whether it can hold above 682 for three consecutive trading days. 2. Whether it can break through 699 with increased volume. Only if both conditions are met can we consider a true strengthening signal. The first support level to watch is 681.7. If it holds above this level, it indicates that the recovery of the 200-day moving average is effective. If it falls back below 682 and fails to recover for a long time, caution is advised. The next support level may be around 653 or 647.