龙头首阴选股指标是基于市场情绪周期和龙头股特性开发的一种【短线选股指标】。它结合了【筹码集中度选股指标】的原理，通过识别龙头股在连续上涨后的首次阴线，判断其短期调整是否到位，从而捕捉二次启动的机会。
该指标不依赖任何【未来函数】，所有信号都是基于历史数据计算得出，确保了信号的可靠性。
ZBCL:=C/REF(C,1)>=1.0987;
ZBCL1:=BARSLAST(ZBCL);
ZBCL2:=SUM(ZBCL,5);
ZBCL3:=(C-REF(C,1))/REF(C,1)<=0.097 AND V>10 AND ZBCL1<=1 AND ZBCL2>=3;
ZBCL4:=NOT(NAMELIKE('S') OR NAMELIKE('*S')) AND VOL>1;
ZBCL5:=NOT(CODELIKE('688')) AND VOL>1;
ZBCL6:=NOT(CODELIKE('30')) AND VOL>1;
ZBCL7:=MA(REF(LLV(C,30),1),2),COLORABFF46;
ZBCL8:=(C-ZBCL7)/ZBCL7*100;
ZBCL9:=MA(C,60);
ZBCL10:=MA(C,120);
ZBCL11:=(ZBCL9-ZBCL10)*10;
ZBCL12:=O>REF(C,1) AND C>=REF(C,1) AND O>REF(O,1);
ZBCL13:=O>REF(C,1) AND C>=O;
ZBCL14:=(C-O)/O*100;
ZBCL15:=ATAN((ZBCL9/REF(ZBCL9,1)-1)*100)*180/3.14159;
XG:=ZBCL4 AND ZBCL3 AND ZBCL5 AND ZBCL6;
DRAWICON(XG,1,9);
STICKLINE(XG,0,1,3,0),COLORRED;
DRAWTEXT(XG,0.75,' ★龙头首阴'),COLOR00FFFF;
