快线:=(CLOSE-LLV(LOW,9))/(HHV(HIGH,9)-LLV(LOW,9))*100;慢线:=SMA(快线,3,1);空:=SMA(慢线,3,1);转牛:BArslAST(CROSS(慢线,空))<9 AND CROSS(慢线,空) AND 慢线<20;