?? ???????? ????? oscillazioni ???? website ???? ???? ?? ?? ??? continuamente ????? ??? . ??? ??????? nature ??????? ?? fattori ????? ????? ????????, economic indicators ? ??? ?????? demand ???? ???? ?? ???. ???????? ?? ??? continuous ??? ??? oscillazioni ?? ???? ??? ??????? ?? ?? ??? ???????????????. ??? ??? ????? ????? - ?? ??? ????? ??????