指标里出现红箭头做选股预警

编写要求：

MID:=(3*CLOSE+LOW+OPEN+HIGH)/6;金牛线:(20*MID+19*REF(MID,1)+18*REF(MID,2)+17*REF(MID,3)+16*REF(MID,4)+15*REF(MID,5)+14*REF(MID,6)+13*REF(MID,7)+12*REF(MID,8)+11*REF(MID,9)+10*REF(MID,10)+9*REF(MID,11)+8*REF(MID,12)+7*REF(MID,13)+6*REF(MID,14)+5*REF(MID,15)+4*REF(MID,16)+3*REF(MID,17)+2*REF(MID,18)+REF(MID,20))/210,COLORRED;金马线:MA(金牛线,6),COLORYELLOW;DRAWICON( FILTER(CROSS(金牛线,金马线),20),金马线+0.02 ,1);C幼马:=CROSS(C,MA(C,25));DRAWTEXT(C幼马 ,L,'*潜'),COLORYELLOW;AA:=BARSLAST(CROSS(EMA(C,8),EMA(C,3)) AND C>MA(C,25));C操盘线:=CROSS(C,EMA(C,144));DRAWTEXT(C操盘线,L,'*CP'),COLORF0F000;

解答：

MID:=(3*CLOSE+LOW+OPEN+HIGH)/6;