When to trade which pair?

When which pair yes the titel say everything
I would like to know what pair at what sesion should be right for tarding specially im very interested in the asien and new york session got any tips or suggestion

If you are just beginning, some might say keep it simple and stick with just 1 pair to start. Learn how it moves during your sessions.

Basically, you want the major market(s) for at least half of your pair to be open during the time you trade it.

Asian Session
USD/JPY, EUR/JPY, GBP/JPY....

European Session
EUR/USD, GBP/USD, USD/CHF...

US Session
EUR/USD, GBP/USD, USD/CHF, USD/JPY....

Keep in mind, the Asian session is very low volume, Eurpoean the highest volume/most active, with the US session being second.

Some say the overlap of the European and US session is the best time to trade.

thanks for you reply i will give it a try
i know about asien but i cant trade london so there is just asien and the rest of usa for me

If you want a really detailed look at the volatility of particular pairs during different sessions then have a look at this: http://www.forexmarkethours.com/volatility/05/

I just remembered that I have a pdf file from some years ago which details the volatility of currency pairs during different sessions. The analysis is based on data from BIS (Bank for International Settlements, essentially the central bank of central banks). Although it is based on data from 2002-2004, the main points should still be valid - ie the most liquid currencies being the EU, UJ and GU; Asian session being the lowest liquidity and so on. I have marked the most important points in yellow, but you can go ahead and remove them (not with the basic Adobe pdf viewer, though).