$BTC The afternoon low for the boss retraced to 641, which is very close to the key support level of 638 we previously marked. The support area has once again experienced an effective test. In just a few hours, the four-hour Bollinger Bands have rapidly switched formations, with the overall trend moving upward in the morning, the upper band turning downward first to form a downward pressure, and now the trend has again flattened and slightly turned upward. The market's pace of change is very fast.

Combined with the current weekend market liquidity being relatively weak, the overall volatility space is naturally limited. The market has been oscillating sideways around 644 for a long time, with insufficient downward momentum. The daily chart's bottom support level has slightly risen compared to yesterday, with the bulls quietly strengthening their hold, but the resistance level above still remains firmly in place.