#2 Reasons Reason 1: Extremely high liquidity given that the European session is the most active Forex market in the world. Reason 2: Around 85% of all Forex transactions involve the USD. Reason 3: Most economic reports are announced near the start of the US session at about 12pm GMT (8pm SG time). As the US has a large influence on the world, volatility will be high at the start, providing traders with opportunities to make a quick profit.