首板涨停板次日出现放量走势后，股价未能延续强势反而快速回落，直至跌破首板实体最低价形成技术破位。当累计跌幅超过首板实体低点15%时，主图系统自动用浅灰色区间标注超跌区域，并通过趋势线连接该区间顶部与首板次日高点，直观呈现下跌轨迹。
这种底部首板突破模式在实盘中较为常见，现将配套开发的主图指标及选股公式公开分享。需注意选股指标筛选结果较多，投资者应结合二次探底形态进行二次筛选：以近期同步出现的五个实战案例为例，所有标的在首板启动前均完成标准二次探底动作，随后展开底部首板行情。
信号不多，每月一二十个。请先选股，后翻看。
{〖破位板后阴〗量化模型 首板涨停主图源码如下}
SH:=CODELIKE('00') OR CODELIKE('60');
SZ:=CODELIKE('30') OR CODELIKE('68');
SS:=CODELIKE('4') OR CODELIKE('8');
X1:=IF(SH,0.1,IF(SZ,0.2,IF(SS,0.3,100)));
ZT:=C=H AND C>=ZTPRICE(REF(C,1),X1);
ZB:=C<H AND H>=ZTPRICE(REF(C,1),X1);
SYX:=100*(H-MAX(C,O))/REF(C,1)NODRAW;
ST:=100*ABS(C-O)/REF(C,1)NODRAW;
XYX:=100*(MIN(C,O)-L)/REF(C,1)NODRAW;
T1:=ZT AND COUNT(ZT,10)=1 AND COUNT(ZB,10)=0 AND ST>8 AND L<=REF(H,1);
T2:=REF(T1,1) AND V>REF(V,1) AND ZT=0;
N1:=BARSLAST(T2);
X2:=100*(LLV(C,N1)/REF(O,N1+1)-1),NODRAW,COLORWHITE;
T3:=COUNT(ZT,N1)=0 AND COUNT(ZB,N1)=0 AND X2<-15 AND REF(H,N1)>HHV(C,N1) AND N1<40;
N2:=BARSLAST(X2>-15);
STICKLINE(T3,HHV(C,N2),LLV(C,N2),5,0)COLOR808080;
DRAWKLINE(H,O,L,C);
STICKLINE(ZT,H,L,0,0)COLORYELLOW;
STICKLINE(ZT,C,O,3,0)COLORYELLOW;
DRAWLINE(T2,H,T3 AND REF(T3,1)=0,L,0);
{〖破位板后阴〗量化模型 首板涨停副图源码如下}
SH:=CODELIKE('00') OR CODELIKE('60');
SZ:=CODELIKE('30') OR CODELIKE('68');
SS:=CODELIKE('4') OR CODELIKE('8');
X1:=IF(SH,0.1,IF(SZ,0.2,IF(SS,0.3,100)));
ZT:=C=H AND C>=ZTPRICE(REF(C,1),X1);
ZB:=C<H AND H>=ZTPRICE(REF(C,1),X1);
SYX:=100*(H-MAX(C,O))/REF(C,1);
ST:=100*ABS(C-O)/REF(C,1);
XYX:=100*(MIN(C,O)-L)/REF(C,1);
T1:=ZT AND COUNT(ZT,10)=1 AND COUNT(ZB,10)=0 AND ST>8 AND L<=REF(H,1);
T2:=REF(T1,1) AND V>REF(V,1) AND ZT=0;
N1:=BARSLAST(T2);
X2:=100*(LLV(C,N1)/REF(O,N1+1)-1);
T3:COUNT(ZT,N1)=0 AND COUNT(ZB,N1)=0 AND X2<-15 AND REF(H,N1)>HHV(C,N1) AND N1<40;
