The recent upward stretch of Bitcoin from October 15 to December 17 has come to an end. At the current daily level, we can see the head and shoulders falling and unable to rebound. We should also observe the support of 90,000 and 92,000 at any time. And the momentum indicator of the daily K. If the daily level retreats, the long-term game will be around 87,000. At present, the upper structure has not been completely broken, but there has been a phenomenon of no volume rebound. The lower trend support has been broken again and again, and we can only say that those who go long should pay attention to the risks.