答疑区有同学求助写一个底背离选股，写好之后，9月出票1000多，原来不想发帖共享，后来优化了9月出票99张。
KDJ与股价形成背离后，股价突破底背离区间最高KDJ的K值出票。优化加上缩量突破和底背离区间控制，选股和主图用到了向前赋值未来函数。但我认为这个未来函数不影响出票。为什么？因为出票时底背离已经形成后再在底背离区间的最高K值画线，线形成后 股价缩量突破这条线出票。最怕的就是那些懂一点函数的跟帖要我解释，所以提前预告，怕未来函数的千万不要用。
源码
{主图}
T:=BARSLAST(L=LLV(L,10));
K_KDJ:=KDJ.K;
L1:=REF(L,T);
L2:=REF(L1,T+1);
K1_REF:=REF(K_KDJ,T);
K2:=REF(K1_REF,T+1);
TJ:=L1<L2 AND K1_REF>K2 AND T=0 AND REF(T,1)>3;
TJT:=BARSLAST(TJ);
QF:=BACKSET(TJ,REF(T,1)+2);
QT:=BARSLAST(CROSS(QF=1,0.5));
VV:=HHV(VOL,20)/VOL;
KK:=IF(QF=1,K_KDJ,-9999);
HH:=HHV(KK,QT);
TT:=BARSLAST(KK=HH);
TC:=QT-TJT;
XG:=CROSS(K_KDJ,REF(KK,TT)) AND QT<20 AND VV>2.5 AND TC<7;
DRAWLINE(QT=0,L,TJT=0,L,0),COLORRED;
STICKLINE(XG,C,O,2,0),COLORBROWN;
STICKLINE(XG,H,L,0,0),COLORBROWN;
DRAWTEXT(QT=0,L*0.95,'底背离'),COLORYELLOW;
DRAWICON(XG,H*1.05,9);
RSV1:=(CLOSE-LLV(LOW,9))/(HHV(HIGH,9)-LLV(LOW,9))*100;
K_SMA:SMA(RSV1,3,1);
D:SMA(K_SMA,3,1);
J:3*K_SMA-2*D,LINETHICK1;
T2:=BARSLAST(L=LLV(L,10));
L1_2:=REF(L,T2);
L2_2:=REF(L1_2,T2+1);
K1_REF2:=REF(K_SMA,T2);
K2_2:=REF(K1_REF2,T2+1);
TJ2:=L1_2<L2_2 AND K1_REF2>K2_2 AND REF(T2,1)>3 AND T2=0;
TJT2:=BARSLAST(TJ2);
QF2:=BACKSET(TJ2,REF(T2,1)+2);
QT2:=BARSLAST(CROSS(QF2=1,0.5));
KK2:=IF(QF2=1,K_SMA,-9999);
HH2:=HHV(KK2,QT2);
TT2:=BARSLAST(KK2=HH2);
TC2:=QT2-TJT2;
XG2:=CROSS(K_SMA,REF(KK2,TT2)) AND QT2<20 AND V<REF(V,1) AND HHV(VOL,20)/VOL>2.5 AND TC2<7;
DRAWLINE(TT2=0,K_SMA,REF(TT2=0,1),REF(K_SMA,1),1),COLORGREEN;
DRAWLINE(QT2=0,K_SMA,TJ2,K_SMA,0),COLORRED,LINETHICK2;
DRAWICON(XG2,K_SMA,1);
DRAWTEXT(QT2=0,K_SMA,'底背离'),COLORYELLOW;
RSV1_3:=(CLOSE-LLV(LOW,9))/(HHV(HIGH,9)-LLV(LOW,9))*100;
K3:=SMA(RSV1_3,3,1);
D3:=SMA(K3,3,1);
J3:=3*K3-2*D3;
T3:=BARSLAST(L=LLV(L,10));
L1_3:=REF(L,T3);
L2_3:=REF(L1_3,T3+1);
K1_REF3:=REF(K3,T3);
K2_3:=REF(K1_REF3,T3+1);
TJ3:=L1_3<L2_3 AND K1_REF3>K2_3 AND REF(T3,1)>3 AND T3=0;
TJT3:=BARSLAST(TJ3);
QF3:=BACKSET(TJ3,REF(T3,1)+2);
QT3:=BARSLAST(CROSS(QF3=1,0.5));
KK3:=IF(QF3=1,K3,-9999);
HH3:=HHV(KK3,QT3);
TT3:=BARSLAST(KK3=HH3);
TC3:=QT3-TJT3;
XG3:CROSS(K3,REF(KK3,TT3)) AND QT3<20 AND V<REF(V,1) AND HHV(VOL,20)/VOL>2.5 AND TC3<7;
