1.首板收阴指标通过筛选出符合特定的涨停板形态、成交量、主力控盘度等多维度条件的信号，在首板之后出现首阴形态。
2.信号数量不多，尾盘或盘中预警使用均可，同时排除杂毛以及市值过小或过大的标的，并确保主力控盘度在50%-75%之间，避免三连板后的风险。
HG1:=(C/REF(C,1)>1.195 AND C=H);
HG2:=(CLOSE/REF(CLOSE,1)>1.095 AND C=HIGH);
HG3:=HG2 AND REF(HG2, 1);
HG4:=REF(HG1,1) OR REF(HG3,2);
HG5:=NOT(REF(HG3,1) AND REF(HG2,3));
HG6:=V=HHV(VOL,5);
HG7:=CLOSE< OPEN;
HG8:=NOT(NAMELIKE('ST') OR NAMELIKE('*ST') OR NAMELIKE('SST') OR NAMELIKE('S*ST'));
HG9:=FINANCE(40)>=1000000000 AND FINANCE(40)< 30000000000;
HG10:=EMA((WINNER(CLOSE)*70), 3);
HG11:=EMA(((WINNER((CLOSE*1.1))-WINNER((CLOSE*0.9)))*80),3);
HG12:=((HG10/(HG10+HG11))*100);
HG13:=HG12>=50 AND HG12< 75;
HG14:=HG4 AND HG6 AND HG7 AND HG8 AND HG9 AND HG13 AND HG5;
STICKLINE(HG14,0,2,2,0),COLOR00FFFF;
DRAWTEXT(HG14,1.82,' ★首板首阴'),COLOR0000FF;
