通达信凹型反转副图选股公式

M值可以设定，

当为一时，中间的K线数是三四五的选股，
当为二时，中间的K线数是六七八的选股，以此类推。

源码
 
M:=1;
 N:=M*3;

 BB:=REF(C,1)/REF(O,1)<1.04 AND REF(C,1)/REF(O,1)>0.9 AND REF(C,1)/REF(C,2)<1.03;
 B1:=EVERY(BB,N);
 B2:=EVERY(BB,N+1);
 B3:=EVERY(BB,N+2);
 BJ1:=(REF(C,N+2)+REF(L,N+1))/2;
 BJ2:=(REF(C,N+3)+REF(L,N+2))/2;
 BJ3:=(REF(C,N+4)+REF(L,N+3))/2;
 BB1:=B1 AND EVERY(REF(H,1)<BJ1,N) AND REF(C,N+2)/REF(C,N+1)>1.08 AND C>=REF(O,N+1) AND C>=BJ1;
 BB2:=B2 AND EVERY(REF(H,1)<BJ2,N+1) AND REF(C,N+3)/REF(C,N+2)>1.08 AND C>=REF(O,N+2) AND C>=BJ2;
 BB3:=B3 AND EVERY(REF(H,1)<BJ3,N+2) AND REF(C,N+4)/REF(C,N+3)>1.08 AND C>=REF(O,N+3) AND C>=BJ3;
 XG:BB1 OR BB2 OR BB3;