Bitcoin experienced a 'Black Friday' yesterday, with severe market fluctuations. The price dropped from around 106,500 to 102,286, impacting many retail investors' emotions. However, there is still profit potential in short-term strategies. After a correction in the evening, the market entered a range-bound oscillation, indicating that the tug-of-war between bulls and bears is temporarily stuck. The price is fluctuating in the lower Bollinger Bands area, with the center of gravity moving upward, while the Bollinger Bands are expanding, indicating increased market volatility and suggesting a potential directional choice in the short term. The four-hour K-line chart shows significant characteristics of testing the lower band. Currently, it continues to test the support level of the lower Bollinger Band. If this level forms an effective bottom, it will help elevate the short-term lower support line, providing technical support for confirming the bullish trend and suggesting that the price may open an upward channel. On the hourly level, the price is oscillating in the lower Bollinger Bands area and the center of gravity continues to rise, while the Bollinger Bands are in an expanding state, indicating that market volatility is intensifying. In the morning layout, we adopted a high sell-low buy strategy, waiting for market breakout in a short-term operation format.