请老师帮忙改一改“高难度黑马启动公式”

MA6:=MA(CLOSE,6);
MA18:=MA(CLOSE,18);
MA3:(3)*(MA18) - (2)*(MA6),LINETHICK2,COLORGREEN;
MA4:(3)*(MA6) - (2)*(MA18),LINETHICK2,COLORRED;
ZX:=(MA3+MA4)/2,COLORFFFFFF,,LINETHICK2;
M1:=SUM((EMA((CLOSE + LOW)/(2),2))/(2.98),3),POINTDOT,COLORFFFFFF;
M2:=EMA(M1,21),COLORFF00FF;
M30:=MA(CLOSE,30),LINETHICK1,COLORFF0000;
VAR1:=(2)*(MA((LLV((CLOSE + LOW)/(2),8))*(1.1),13)) - EMA((CLOSE + LOW)/(2),3) - ((CLOSE + LOW)/(2))*(0.1);
VAR2:=IF(((EMA((CLOSE + LOW)/(2),3) - VAR1)*(5) > 0),(POW((EMA((CLOSE + LOW)/(2),3) - VAR1)*(5),2))/(10),(((-1))*(POW((EMA((CLOSE + LOW)/(2),3) - VAR1)*(5),2)))/(10));
VAR3:=IF((VAR2 > 0),VAR2 - 0,(-1));
DRAWTEXT(CROSS(VAR3,0) AND ((CLOSE + LOW)/(2) > MA((CLOSE + LOW)/(2),8)),(M2)*(1.01),'买入'),LINETHICK2,COLORYELLOW;
STICKLINE(CROSS(VAR3,0) AND ((CLOSE + LOW)/(2) > MA((CLOSE + LOW)/(2),8)),(LOW)*(0.99),(LOW)*(0.95),4,0),COLORYELLOW;
想把公式内中的MA4上穿MA3时改成为选股指标..谢谢老师

MA6:=MA(CLOSE,6);
MA18:=MA(CLOSE,18);
MA3:=(3)*(MA18) - (2)*(MA6);
MA4:=(3)*(MA6) - (2)*(MA18);
cross(MA4,MA3);