Quote from dbphoenix:
Ignore anyone who claims that you should stay away from certain times or time periods and focus on other times or time periods.
First, decide what kind of trading you want to do, e.g., scalping, range-trading, trend-trading, etc.
Second, determine what rules you will follow for entering, managing, and exiting trades.
Third, test your rules on old charts, then in real time, in order to determine when they provide the highest probability trades, i.e., trades which result in a profit.
Fourth, determine whether there is any consistent relationship between times of day and your most profitable trades.
Fifth, trade only during those times, if any, which provide the best opportunities for profit. If there is no consistent relationship, trade your plan, not the time of day.