Asian stocks edged higher on Tuesday after a six-day losing streak and the dollar firmed against the safe-haven Japanese yen, but gains were muted ahead of Chinese data which could offer more clues on the health of its economy. Chinese trade data at 0200 GMT is likely to show a further contraction in both imports and exports in August and point to a continued economic slowdown, but are not expected to offer any signs of a hard landing which some global investors have begun to fear.