BOLL:=MA(CLOSE,99);

UB:=BOLL+2*STD(CLOSE,99);

LB:=BOLL-2*STD(CLOSE,99);

A1:=C>BOLL && REF((C<BOLL),1);

A2:=BETWEEN(BARSLAST(A1),4,13);

REF(A2,2) && A1 ;