股价趋势:=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),LINETHICK0;底部警戒:=10,COLORRED,LINETHICK0;买入信号:CROSS(股价趋势,底部警戒);