编写要求：
请老师帮忙写个出现买进提示的选股公式。先谢了。
成本:(MA(CLOSE,60)+MA(CLOSE,70)+MA(CLOSE,90)+MA(CLOSE,108))/4,COLORYELLOW,LINETHICK2;
VAR1:=(C+H+O+L)/4;
卖出:XMA(VAR1,N)*(1+P1/1000),COLORGREEN,LINETHICK2;
买入:XMA(VAR1,M)*(1-P2/1000),COLORMAGENTA,LINETHICK2;
幅度:100*(卖出-买入)/买入,NODRAW;
MA1:=MA(VAR1,3);
STICKLINE(卖出>LOW AND 卖出MIN(C,O) AND 卖出LOW AND 卖出LOW AND 买入MIN(C,O) AND 买入LOW AND 买入HIGH,OPEN,CLOSE,3,0),COLORMAGENTA;
STICKLINE(买入>HIGH,HIGH,LOW,0,0),COLORMAGENTA;
DRAWTEXT(CROSS(C,买入) OR (L<买入),LOW*0.95,'Ｂ'),COLORRED,LINETHICK2;
A3:=(C-LLV(L,9))/(HHV(H,9)-LLV(L,9))*100;
A4:=SMA(A3,3,1);
A5:=SMA(A4,3,1);
A6:=3*A4-2*A5;
A7:=C-REF(C,1);
A8:=100*EMA(EMA(A7,6),6)/EMA(EMA(ABS(A7),6),6);
买:=LLV(A8,2)=LLV(A8,7) AND COUNT(A8<0,2) AND CROSS(A8,MA(A8,2));
DRAWTEXT(FILTER(买=1,5),LOW-0.05,'↖买进'),COLORYELLOW;
STICKLINE(买,OPEN,CLOSE,2,0),COLORYELLOW;
VAR11:=(2*CLOSE+HIGH+LOW+OPEN)/5;
A11: (EMA(VAR11,3)+EMA(VAR11,6)+EMA(VAR11,12)+EMA(VAR11,24))/4;
A22: EMA(A11,2);
A33: EMA(A22,2);
A44: EMA(A33,2);
A55: EMA(A44,2);
A66: EMA(A55,2);
A77: EMA(A66,2);
A88: EMA(VAR11,2.78)*1.028;
A99: MA(OPEN,3.2)*1.028;
解答：
?A7:=C-REF(C,1);
A8:=100*EMA(EMA(A7,6),6)/EMA(EMA(ABS(A7),6),6);
