New York and London: 8:00 am – 12:00 noon EST
Sydney and Tokyo: 7:00 pm – 2:00 am EST
London and Tokyo: 3:00 am – 4:00am EST

Trading when market sessions overlap provides higher volume and volatility.

For example, trading EUR/USD, GBP/USD currency pairs would give good results between 8:00 am and 12:00 noon EST when two markets for those currencies are active.