股市灯塔指标 发生漂移的原因

编写要求：

麻烦老师解释一下为什么短牛 种牛 大牛 指标出现后 会发生漂移，主要是解释一下影响漂移的因素顺便请老师看一下有无未来函数，我用软件检测是没有未来函数的N1:=5;N2:=10;STICKLINE(C>0,0,10,15,0),COLOR781816;LC:=REF(CLOSE,1);RSI5:SMA(MAX(CLOSE-LC,0),N1,1)/SMA(ABS(CLOSE-LC),N1,1)*10,COLORFF00FF,LINETHICK1;RSI10:SMA(MAX(CLOSE-LC,0),N2,1)/SMA(ABS(CLOSE-LC),N2,1)*10,COLOR00FFFF;VAR1:=C-REF(C,1);VAR2:=100*EMA(EMA(VAR1,6),6)/EMA(EMA(ABS(VAR1),6),6);MA5:=EMA(C,5);MA13:=EMA(C,13);UP:=DRAWLINE(L=LLV(L,BARSLAST(CROSS(MA13,MA5))+1),LLV(L,BARSLAST(CROSS(MA13,MA5))+1),H=HHV(H,BARSLAST(CROSS(MA5,MA13))+1),HHV(H,BARSLAST(CROSS(MA5,MA13))+1),0),COLOR0000FF;DOWN:=DRAWLINE(H=HHV(H,BARSLAST(CROSS(MA5,MA13))+1),HHV(H,BARSLAST(CROSS(MA5,MA13))+1),L=LLV(L,BARSLAST(CROSS(MA13,MA5))+1),LLV(L,BARSLAST(CROSS(MA13,MA5))+1),0),COLOR00FF00;BT:(LLV(VAR2,2)=LLV(VAR2,7) AND COUNT(VAR2<0,2) AND CROSS(VAR2,MA(VAR2,2))) ANDREF(DOWN,1)REF(DOWN,1);0,COLORFF00FF;10,COLORFF0000;STICKLINE(UP,0,0.2,3,0),COLOR0000FF;STICKLINE(DOWN,0,0.2,3,0),COLOR00FF00;STICKLINE(BT,0,3,2,0),COLOR000088;STICKLINE(BT,0,3,1,0),COLOR0000CC;STICKLINE(BT,0,3,0.22,0),COLOR0000FF;DRAWTEXT(BT,3,'短牛'),COLOR0000FF;短牛:IF(BT,4,0),COLORGREEN,LINETHICK2;TJ1:=REF(DOWN,1)REF(DOWN,1) AND CREF(DOWN,1) AND CREF(DOWN,1) AND CREF(UP,2) AND DOWN

解答：

 很简单。最高低价向前满足条件出信号。再出现更高低价信号当然就变了。