指标通过识别连续下跌后出现的大阳线反转信号，提示短线买入机会。
{一阳遮三阴副图指标}
HG1:=DOWNNDAY(C,3);
HG2:=EVERY(O>C,3);
HG3:=C>=REF(MAX(C,O),3);
HG4:=O<=REF(MIN(C,O),1);
HG5:=REF(HG1,1);
HG6:=REF(HG2,1);
HG8:=HG3 AND HG4 AND HG5;
HG9:=HG3 AND HG4 AND HG6;
XG:HG9 OR HG8,COLORYELLOW,LINETHICK1;
