Which currency is the better bet - the dollar or the euro? For investors looking to make money in the foreign-exchange markets, the answer could be neither - some experts say the best opportunities are in currencies further off the beaten path.

During the past three months, the euro/dollar trading range has narrowed. The euro fetched no more than $1.4683 and no less than $1.3978 - a $0.0906 range, compared with an average of $0.1201 over the past year.