If you've been buying the dollar against the yen, congratulations. It has been one of the most popular currency trades in recent weeks - and one of the most successful.
After a run like that, does the trade still have legs?
You betcha, says Kathy Lien, managing director at BK Asset Management.
"While it's tempting to say this move has gotten overdone, let's try to pick a top, I think doing so would be like standing in front of a runaway train," she says.
Lien told CNBC's Melissa Lee that even though the dollar has risen about 12% against the yen since the beginning of 2012's fourth quarter, by her count the pair is "fairly valued, not overvalued." Also, new trading data shows that net long positions in the dollar-yen pair, while large, have declined for two straight weeks. That means, Lien says, "that there are still some people sitting on the sidelines who may want to get back in."