$BTC made it very clear yesterday, if the rebound does not exceed 90700, then go short. Last night there was a smooth rebound without breaking the high, forming a 30-minute double sell. If friends who opened positions are able to gain 3000 points profit, then today we need to pay attention to the position of the upper rail of the 30-minute central axis below. As long as 81200 does not break, we can go long directly. If it breaks, then cut losses. The short position follows the same logic, just go short if the rebound does not exceed 90700, and cut losses if it breaks above 90700.