EVERY(C>REF(C,1),3),BK(1);
BKVOL>0&&C>BKPRICE+2*MINPRICE,BK(1);
C>BKPRICEAV+3*MINPRICE,SP(BKVOL);
C<BKPRICEAV-10*MINPRICE,SP(BKVOL);
EVERY(C<REF(C,1),3),SK(1);
SKVOL>0&&C<SKPRICE-2*MINPRICE,SK(1);
C<SKPRICEAV-3*MINPRICE,BP(SKVOL);
C>SKPRICEAV+10*MINPRICE,BP(SKVOL);