Some days are busier than other in the forex market. Tuesday, Wednesday and Thursday are the most active days. From Sunday evening until Monday/Tuesday traders are mostly watching and analyzing the market to determine price direction. Trading then carries on until about noon (EST) on Fridays then begins to slow down until market closing at 5 pm EST.
European Trading Hours:
The London trading session is 8:00 - 17:00 GMT London is one of the major shopping centers of the world with a market share, of at least, 30 % and a trading volume of $580 billion. This market share and volume makes the London market just about the most volatile of all forex sessions.
The most active pairs of the London session include pairs based on the GBP and the EUR. The pairs USD/CHF, USD/CAD and EUR/USD are also fairly active. Conversely, pairs based on the JPY traditionally do not attract active traders during this session.

