$BAS 15 minutes surged 9 points; volume and turnover doubled or more, yet OI is still falling? This move feels more like shorts are running for the exits, not real bulls entering. The close has already pierced the upper edge of the past 20 K-lines, and the active buying orders clearly overwhelm the selling pressure. In the whole pool, it ranks 10th in abnormality, and the nominal change is also within the top 10—not random small moves. This signal is worth watching today to see whether it can hold and confirm in the following sessions.