一直在看的海风2号主图，无未来将里面的进攻做一选股公式

编写要求：

MA5:MA(CLOSE,5),COLORFFFFFF,LINETHICK2;MA13:MA(CLOSE,13),COLOR00FF00;MA21:MA(CLOSE,21),COLOR00FFFF,LINETHICK2;MA34:MA(CLOSE,34),COLORFF00FF;{MA55:MA(CLOSE,55),COLOR0000FF;}{MA120:=MA(CLOSE,120),COLORFFFF00;}天使:=EMA(C,2),COLOR000000;魔鬼:=EMA(SLOPE(C,21)*20+C,42),COLOR000000;买:=CROSS(天使,魔鬼);卖:=CROSS(魔鬼,天使);DRAWICON(买,L*0.97,1);DRAWTEXT(买,L*0.95,'进攻'),COLORYELLOW;DRAWICON(卖,H*1.03,2);DRAWTEXT(卖,H*1.05,'撤退'),COLORWHITE;STICKLINE(天使>=魔鬼,LOW,HIGH,0.01,0),COLOR0000DD;STICKLINE(天使>=魔鬼,CLOSE,OPEN,2,1),COLORRED;{STICKLINE(天使>=魔鬼,CLOSE,OPEN,3,0),COLOR0000CC;STICKLINE(天使>=魔鬼,CLOSE,OPEN,2,0),COLOR0000DD;STICKLINE(天使>=魔鬼,CLOSE,OPEN,1,0),COLOR0000FF;}{STICKLINE(天使<魔鬼,CLOSE,OPEN,1,0),COLOREEEE00;STICKLINE(天使<魔鬼,CLOSE,OPEN,2,0),COLORDDDD00;STICKLINE(天使<魔鬼,CLOSE,OPEN,3,0),COLORCCCC00;}STICKLINE(天使<魔鬼,LOW,HIGH,0.01,0),COLORFFDD00;STICKLINE(天使<魔鬼,CLOSE,OPEN,2,0),COLORFFFF00;STICKLINE(CROSS(天使,魔鬼),OPEN,CLOSE,2.5,0),COLORYELLOW;STICKLINE(CROSS(魔鬼,天使),OPEN,CLOSE,2.5,0),COLORWHITE;

解答：

 天使:=EMA(C,2);