将飞狐中的“战鹰出击”指标改为预警指标

编写要求：

LY1:=(LOW+HIGH)/2; LY2:=REF(LY1,1); LY3:=(SMA(LY1-LY2,12,1))/(SMA(ABS(LY1-LY2),12,1))*100; L1:LY3,colorFFFFFF; L2:EMA(L1,8),LINETHICK1,colorFFFF; L3:EMA(L1,20),LINETHICK1,colorFF00FF; L4:EMA(L2,40),LINETHICK1,colorFF00; STICKLINE(L4-REF(L4,1)>0,-100,-95,10,0),colorDDDDDD; STICKLINE(L4-REF(L4,1)<0,-100,-95,10,1),color889900; 战鹰:IF(CROSS(L1,L3) AND L2<-30,50,-80),LINETHICK2,colorFF;

解答：

?LY1:=(LOW+HIGH)/2;

?LY2:=REF(LY1,1);