Gold ticked higher on Tuesday as the euro rebounded although trading was cautious with investors waiting for the outcome of a Federal Reserve meeting, which could offer clues over the direction of interest rates in the world's largest economy. Gold added $3.45 to $1,702.50 an ounce by 0707 GMT, with support at the 200-day moving average of around $1,680 an ounce. Bullion rallied to an all-time high around $1,920 an ounce last September. US April gold rose $3.40 to $1,703.20 an ounce.