The majors are usually the best currency pairs to trade.
Out of all, US is the most dominant and strongest one as it is the worlds largest economy.
There may be many currencies which are popular or highly liquid .however,it does not imply that they are best currency pairs to trade.
The best currency pairs are :
1. USD/EUR – This currency pair is the most popular currency pair as well as not too volatile. It has got the lowest spreads and so least risk.
2. USD/GBP – Though this pair is a volatile one however, one must keep in mind that larger profits come with larger risks.So many traders prefer to trade in this pair.
3. USD/JPY – It is another popular currency which has low spreads , less risk and a great chance of generating high profits for its traders.
Apart from the above mentioned currencies ,AUD/USD , USD/CHF ,USD/CAD are also good pairs to trade forex.