BOLL做多空

MID : MA(CLOSE,26);

UPPER: MID + 2*STD(CLOSE,26);

LOWER: MID - 2*STD(CLOSE,26);

A1:=MID>REF(MID,1) AND REF(MID,1)<REF(MID,2);

A2:=MID<REF(MID,1) AND REF(MID,1)>REF(MID,2);

DRAWTEXT(O>UPPER AND C<UPPER OR A2,H+1,'做空') COLORGREEN;

DRAWTEXT(O<LOWER AND C>LOWER OR A1,L-1,'做多') COLORRED;