What & when to trade ?

During the 24 hours period currency pairs in Forex market experience several hours, when the volume of trades is the highest and so is the pip movement.

Below are Forex market sessions and examples of the most active currency pairs:

London/ New York sessions:

EUR/USD 
USD/CHF 
GBP/USD

Tokyo/Sydney sessions:

EUR/JPY
AUD/USD
USD/JPY 
AUD/JPY

Sydney session:

AUD/USD
EUR/USD

During the week the most active Forex trading days are: Tuesday, Wednesday and Thursday. Sundays (opening) and Mondays are days when traders are mostly watching and analyzing the market and predict further price moves. Fridays are traded approximately till noon, after that all actions slow down and almost freeze before the actual market closing at 5 pm EST.

Sourcing:
http://www.forexmarkethours.com