股价从布林线上轨回调到布林线中轨附近的选股公式。公式模块 n:=20;BOLL:=MA(CLOSE,N);UPPER:=BOLL+2*STD(CLOSE,N);LOWER:=BOLL-2*STD(CLOSE,N);TUP:=BARSLAST(C>UPPER);DOWN:=EVERY(C<REF(C,TUP),TUP-1);CROSS(BOLL,L) AND DOWN and tup>1;