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;

金牛线:=(20*MID+19*REF(MID,1)+18*REF(MID,2)+17*REF(MID,3)+16*REF(MID,4)+15