I'm not an expert on foreign currency trading but here's an interesting article I ran across which argues for the rise of the Chinese Yuan in the years to come.

Without a doubt, the Chinese yuan looks poised to appreciate most in the years to come. 

China has been suppressing their currency for many years. They believe a weak currency is the key to driving and maintaining export growth. Export growth is critical for them as it creates jobs. And jobs are critical for the ruling elite in China because they are extremely concerned about the potential for social unrest. 

But pressure is building for a change in China's currency policy. It will change, and when it does, this currency promises to soar. Eventually, the domestic consumer market will evolve in China, so Chinese will buy the cheap goods they create themselves (rather than importing them to the west). 

When that happens, China will no longer have a need to suppress their currency, and the yuan should move dramatically higher to its true value.

Most economists believe the yuan is at least 40-60% undervalued against the dollar. I think it could be much more. Back in the late 80's, the Japanese yen and Japan were in a similar place as China now. Western nations forced the yen higher in value. And it soared around 80-90% in just a few years.