趋势线:=3*SMA((CLOSE-LLV(LOW,27))/(HHV(HIGH,27)-LLV(LOW,27))*100,5,1)-2*SMA(SMA((CLOSE-LLV(LOW,27))/(HHV(HIGH,27)-LLV(LOW,27))*100,5,1),3,1);见底信号:=10;买点准备:=IF(趋势线<=10,50,0);买入时间:CROSS(趋势线,见底信号);
