把未来不未来组合组图的最下边的红色虚线信号做个选股预警公式

编写要求：

主力:= 3*SMA((CLOSE-LLV(LOW,27))/(HHV(HIGH,27)-LLV(LOW,27))*100,5,1)-2*SMA(SMA((CLOSE-LLV(LOW,27))/(HHV(HIGH,27)-LLV(LOW,27))*100,5,1),2,1),LINETHICK2; 见底信号: 20, LINETHICK2,COLORRED ; 买入准备: IF(主力<=0,50,0), LINETHICK2; 买入时机: IF(CROSS(主力,见底信号),100,18),LINETHICK2,COLORYELLOW; LC:=REF(CLOSE,1); RSI:=SMA(MAX(CLOSE-LC,0),4.1,1)/SMA(ABS(CLOSE-LC),4.1,1)*100,COLORYELLOW,LINETHICK1; 红买:FILTER(CROSS(RSI,11),7),COLORRED; STICKLINE(红买,0,12,6,1),COLORRED; VAR200:=(CLOSE-LLV(LOW,30))/(HHV(HIGH,20)-LLV(LOW,20))*100; VAR300:=SMA(SMA(VAR200,3,1),3,1)/28.57; VAR400:=EMA(VAR300,5); 操盘:=3*VAR300-2*VAR400; A1:=CROSS(操盘,VAR300) AND VAR300<2.1 AND C>O; STICKLINE(A1,20,0,4,0),COLOR0000FF; DRAWTEXT(A1,23,'满仓'),COLORRED; Q_1:=C-REF(C,1); Q_2:=100*EMA(EMA(Q_1,6),6)/EMA(EMA(ABS(Q_1),6),6); Q_3:=CROSS(EMA(C,19),EMA(C,7)); Q_4:=CROSS(EMA(C,7),EMA(C,19)); Z1:=L=LLV(L,BARSLAST(Q_3)+1); Z2:=LLV(L,BARSLAST(Q_3)+1); Z3:=H=HHV(H,BARSLAST(Q_4)+1); Z4:=HHV(H,BARSLAST(Q_4)+1); Q_A:=DRAWLINE(Z1,Z2,Z3,Z4,0); Y1:=H=HHV(H,BARSLAST(Q_4)+1); Y2:=HHV(H,BARSLAST(Q_4)+1); Y3:=L=LLV(L,BARSLAST(Q_3)+1); Y4:=LLV(L,BARSLAST(Q_3)+1); Q_B:=DRAWLINE(Y1,Y2,Y3,Y4,0); TJ:=IF(Q_B=1 AND CCI<-40 ,0,-50,1,-1),COLORRED; 谢谢了，这个指标里最下面的红色虚线预警

解答：

?Q_3:=CROSS(EMA(C,19),EMA(C,7));

Q_4:=CROSS(EMA(C,7),EMA(C,19));