A5:=3*SMA((CLOSE-LLV(LOW,18))/(HHV(HIGH,18)-LLV(LOW,18))*100,21,1)-2*Sma(SMA((CLOSE-LLV(LOW,18))/(HHV(HIGH,18)-LLV(LOW,18))*100,20,1),8,1); 安全位:=20; 低位转强:IF(crOSS(A5,安全位),50,0);