I thing If we like to trade when the market is fluctuating then the right time is the news coming up data.At that time the market is really fluctuating and may goes in the favor or against you.I love to trade in Americans sessions when the market usually moves a lot while in the morning time i like to trade in Asian market.so all make me happy but I just want to trade just after the news data come,and try to pick the right trend also.