将出现红箭头处改成选股预警信号

编写要求：

筹码空间:IF(WINNER(CLOSE),WINNER(CLOSE)*100,20),VOLSTICK;TX80:80,POINTDOT COLORYELLOW;DX20:20,POINTDOT COLORGREEN;VAR1:=LLV(LOW,21);VAR2:=HHV(HIGH,21);K: EMA((CLOSE-VAR1)/(VAR2-VAR1)*100,6),COLORRED;D: EMA(0.667*REF(K,1)+0.333*K,2),COLORGREEN;VAR3:=LLV(LOW,55);VAR4:=HHV(HIGH,34);VAR5:=EMA((CLOSE-VAR3)/(VAR4-VAR3)*100,3);VAR6:=(K+VAR5)/2;VAR7:=EMA(0.667*REF(VAR5,1)+0.333*K,2);VAR8:=EMA(VAR6,5);VAR9:EMA(0.667*REF(VAR8,1)+0.333*VAR8,2);DRAWICON(LONGCROSS(D,K,0.1),D,2),COLORRED;DRAWICON(LONGCROSS(K,D,0.1),K,1),COLORGREEN;

解答：

VAR1:=LLV(LOW,21);