根据tdx主图黄金分割做一个选股公式

编写要求：

请老师根据tdx主图黄金分割上出现介入点的地方做一个选股公式，谢谢！N:=74;M:=3;PC:(C+REF(C,1)+O)/3;高:=REF(HHV(H,N),M); 低:=REF(LLV(L,N),M);H19:=高-(高-低)*0.191; H38:=高-(高-低)*0.382; H中:=高-(高-低)*0.5; H61:=高-(高-低)*0.618; H80:=高-(高-低)*0.809;顶点:REFDATE(高,DATE),COLORWHITE;%19.8:REFDATE(H19,DATE),COLORYELLOW;%38.2:REFDATE(H38,DATE),COLORMAGENTA;%50:REFDATE(H中,DATE),COLORRED;%61.8:REFDATE(H61,DATE),COLORMAGENTA;%80.9:REFDATE(H80,DATE),COLORYELLOW;低点:REFDATE(低,DATE),COLORWHITE;DRAWTEXT(ISLASTBAR,顶点,'顶点'),COLORWHITE;DRAWTEXT(ISLASTBAR,%19.8,'％19.8安全'),COLORYELLOW;DRAWTEXT(ISLASTBAR,%38.2,'％38.2'),COLORMAGENTA;DRAWTEXT(ISLASTBAR,%50,'％50'),COLORRED;DRAWTEXT(ISLASTBAR,%61.8,'％61.8'),COLORMAGENTA;DRAWTEXT(ISLASTBAR,%80.9,'％80.9'),COLORYELLOW;DRAWTEXT(ISLASTBAR,低点,'低点'),COLORWHITE;A:=(3*C+L+O+H)/6;B:(20*A+19*REF(A,1)+18*REF(A,2)+17*REF(A,3)+16*REF(A,4)+15*REF(A,5)+14*REF(A,6)+13*REF(A,7)+12*REF(A,8)+11*REF(A,9)+10*REF(A,10)+9*REF(A,11)+8*REF(A,12)+7*REF(A,13)+6*REF(A,14)+5*REF(A,15)+4*REF(A,16)+3*REF(A,17)+2*REF(A,18)+REF(A,20))/210,COLORWHITE,LINETHICK1;D:MA(B,15),COLORYELLOW,LINETHICK1;VAR4:=(2*CLOSE+HIGH+LOW)/4;R1:=MA(CLOSE,26);R2:=R1-0.25;空方线:=R2;多方线:=EMA(CLOSE,3);DRAWICON(CROSS(多方线,空方线),多方线*0.95,1);VAR1A:=CROSS(MA(CLOSE,5),MA(CLOSE,30));DRAWTEXT(VAR1A,LOW-LOW*0.01,'A'),COLORRED;DRAWTEXT(VAR1A,LOW-LOW*0.03,'介入点'),COLORYELLOW;

解答：

介入点:cross(ma(c,5),ma(c,30));