The dollar held steady in Asian trade on Wednesday, propped up by a Wall Street rally and a drop in world oil prices, dealers said.They said weak German and French economic data were weighing on the euro.The dollar was little changed at 104.19 yen in Tokyo morning trade against 104.24 in New York trade on late Tuesday.The euro edged down to 1.5682 dollars from 1.5686 and to 163.39 yen from 163.53.The greenback was "supported by higher share prices and oil prices that calmed down overnight," said Shigeru Nakane, senior chief manager at Resona Bank.Positive comments on the US economy by San Francisco Federal Reserve Bank Chairman Janet Yellen also helped the greenback, dealers said.