根据斐波那契数列做个选股公式

编写要求：

请老师帮忙编写一个根据斐波那契数列天数来选股的公式。ZL:=EMA(100*(C-LLV(LOW,34))/(HHV(H,34)-LLV(LOW,34)),3);F11:=ZIG(3,15);FXX:=IF((F11> REF(F11,1)),5,105);转向:=CROSS(ZL,FXX);高点:=CROSS(FXX,ZL);VARZT:=BARSLAST(转向);STICKLINE(VARZT=2,L*0.97,L*0.98,8,0),COLOR0000FF;DRAWTEXT(VARZT=2,L*0.95,'3'),COLORYELLOW;STICKLINE(VARZT=4,H*1.03,H*1.02,8,0),COLOR9966FF;DRAWTEXT(VARZT=4,H*1.06,'5'),COLORYELLOW;STICKLINE(VARZT=7,L*0.97,L*0.98,8,0),COLOR00FFFF;DRAWTEXT(VARZT=7,L*0.95,'8'),COLORYELLOW;STICKLINE(VARZT=12,H*1.03,H*1.02,8,0),COLORFF33FF;DRAWTEXT(VARZT=12,H*1.06,'13'),COLORYELLOW;STICKLINE(VARZT=20,L*0.97,L*0.98,8,0),COLOR0066FF;DRAWTEXT(VARZT=20,L*0.95,'21'),COLORYELLOW;STICKLINE(VARZT=33,H*1.03,H*1.02,8,0),COLOR9932CD;DRAWTEXT(VARZT=33,H*1.06,'34'),COLORYELLOW;STICKLINE(VARZT=54,L*0.97,L*0.98,8,0),COLOR006600;DRAWTEXT(VARZT=54,L*0.95,'55'),COLORYELLOW;STICKLINE(VARZT=88,H*1.03,H*1.02,8,0),COLOR00FF00;DRAWTEXT(VARZT=88,H*1.06,'89'),COLORYELLOW;STICKLINE(VARZT=143,L*0.97,L*0.98,8,0),COLORCCFFFF;DRAWTEXT(VARZT=143,L*0.95,'144'),COLORYELLOW;STICKLINE(VARZT=232 ,H*1.03,H*1.02,8,0),COLORFF0033;DRAWTEXT(VARZT=232,H*1.06,'233'),COLORYELLOW;DRAWTEXT(VARZT=377,H*1.06,'377'),COLORYELLOW;STICKLINE(VARZT=377,L*0.97,L*0.98,8,0),COLORFF9966;DRAWTEXT(VARZT=610,H*1.06,'610'),COLORYELLOW;STICKLINE(VARZT=610,L*0.97,L*0.98,8,0),COLOR6B4226;根据此公式只想选出当日是7、8或20、21天的股票。感激不尽！

解答：

 zl:=ema(100*(c-llv(low,34))/(hhv(h,34)-llv(low,34)),3);