将【3日内买入】附图中当天出现（买入）信号时做一个选股公式
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编写要求：

V1:=EMA(CLOSE,60)-EMA(CLOSE,300);V2:=EMA(V1,300);V3:=(CLOSE-LLV(LOW,8))/(HHV(HIGH,8)-LLV(LOW,8))*100;V4:SMA(V3,2,1);V5:SMA(V4,2,1);V6:=CLOSE/REF(CLOSE,3)>=1.1;V7:=BACKSET(V6,3);买入:IF((V7 AND COUNT(V7,3)=1),30,0),COLORYELLOW,LINETHICK3;DRAWTEXT(买入,35,'买入 '),COLORYELLOW,LINETHICK3;

解答：

 V1:=EMA(CLOSE,60)-EMA(CLOSE,300);

V2:=EMA(V1,300);
V3:=(CLOSE-LLV(LOW,8))/(HHV(HIGH,8)-LLV(LOW,8))*100;
V4:=SMA(V3,2,1);
V5:=SMA(V4,2,1);
V6:=CLOSE/REF(CLOSE,3)>=1.1;
V7:=BACKSET(V6,3);
买入:V7 AND COUNT(V7,3)=1;
 
 

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