$BTC In the afternoon, the main force maintained a slow and gradual upward trend. In the evening, it surged to touch the 621 line. The current price is running close to the upper band of the hourly Bollinger Bands; the Bollinger channel is expanding slightly outward, and short-term volatility is rising moderately, but the incremental funds for bulls are insufficient. After the volume-less surge, selling pressure gradually emerges. This is a typical technical pattern of upper band resistance and mean reversion.

Short-term strong resistance: 623
The hourly upper band resistance level. If bulls cannot stand firmly above 623 with volume, it indicates that the rebound momentum is exhausted, high-level trapped positions are being liquidated en masse, and a pullback will begin. If it breaks above 623 with volume, look to the 628-630 second resistance zone.