准确出击 当趋势走好，出现该指标，成功较高
源码
a1:=(CLOSE-LLV(LOW,55))/(HHV(HIGH,55)-LLV(LOW,55))*100; a2:=SMA(a1,13,1); a3:=SMA(a2,13,1); 出击:3*a2-2*a3,coloryellow ,linethick2; 阻力:3*a3-2*a2,colorblue,linethick2 ;
