Suddenly, the greenback is looking a lot greener.
The U.S. dollar index soared more than 1 percent on Thursday, hitting its highest level since Oct. 2. The move was fueled by the decision from ECB President Mario Draghi to leave interest rates unchanged and hinted at further easing. But some experts warn that traders should use the rally as a rare opportunity to get short the currency ahead of next week's FOMC meeting.
"I would be very careful buying the U.S. dollar at this stage," Kathy Lien told CNBC's "Futures Now" on Thursday. According to Lien, recent government data shows a lot more weakness than strength in the U.S. economy, which means the Fed's "hands are tied" in terms of raising interest rates in the near term. "The FOMC is the perfect catalyst for [a move lower] in the dollar."