BOLL:=MA(CLOSE,20);

UB:=BOLL+1.2*STD(CLOSE,20);{买好股公式网WWW.BUYHAOGU.COM};

LB:=BOLL-1.2*STD(CLOSE,20);

BUYHAOGU:=CLOSE > UB;

XG:BUYHAOGU=1 AND REF(BUYHAOGU,1)<>1;