收盘价在布林线中轨上 选股公式

BOLL:=MA(CLOSE,20);UB:=BOLL+2*STD(CLOSE,20);LB:=BOLL-2*STD(CLOSE,20);D:=BETWEEN(C,UB,BOLL);ZF:=(C-REF(C,1))/REF(C,1)*100;D1:CROSS(C,BOLL)AND(D)AND(ZF<N);