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以下是通达信抄底低位选股公式源码（无源码的请下载附件导入）
N:=30;
DIF:=EMA(CLOSE,4)-EMA(CLOSE,43);
DEA:=EMA(DIF,6);
MACD:=(DIF-DEA)*2;
A:=REF(L,1)=LLV(L,N);
A1:=C>=O AND O>=L;
A2:=MACD>0;
A3:=MACD<=0 AND MACD>REF(MACD,1);
A4:=A2 OR A3;
XG1:=A AND A1 AND A4;
B:=L=LLV(L,N);
B1:=C>L AND C>REF(C,1);
B2:=C>O AND O>=L;
B3:=B1 OR B2;
B4:=A4;
XG2:=B AND B3 AND B4;
XG3:XG1 OR XG2;
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