涨停后（涨幅≥9.91%且非一字板）3-20天内，当股价突破该涨停收盘价时买入（15天内信号仅触发1次）。
{主图源码}
A:=(C-REF(C,1))/REF(C,1)*100;
A1:MA(C,5);
A2:MA(C,10);
A3:MA(C,20);
A6:=BARSLAST(A>=9.91 AND H=C AND H>L);
A7:=REF(C,A6);
买1:=CROSS(H,A7) AND A6>=3 AND A6<=20;
买:=FILTER(买1,15);
STICKLINE(买, C,O, 3,0),COLORYELLOW;
STICKLINE(买, C,H, 0,0),COLORYELLOW;
STICKLINE(买, L,O, 0,0),COLORYELLOW;
DRAWTEXT(买,L*0.99,' 龙引择机'),COLORYELLOW;
{副图源码}
A:=(C-REF(C,1))/REF(C,1)*100;
A1:=MA(C,5);
A2:=MA(C,10);
A3:=MA(C,20);
A6:=BARSLAST(A>=9.91 AND H=C AND H>L);
A7:=REF(C,A6);
买1:=CROSS(H,A7) AND A6>=3 AND A6<=20;
买:=FILTER(买1,15);
STICKLINE(买, 0,10, 0,0),COLORYELLOW;
STICKLINE(买, 0,1, 5,0),COLORYELLOW;
DRAWICON(买,10,18);
DRAWTEXT(买,5,' 龙引择机'),COLORYELLOW;
