The dollar was on a roll last week - until it reversed itself for three straight days.
Here's how to play the shift.
For a while there, it looked like the dollar was really headed higher. But when reality set it, the reaction was swift.
"People have been so bulled up over U.S. data and the U.S. yields rising and dollar strengthening," says Amelia Bourdeau, director of foreign exchange at Westpac Institutional Bank. When a report on consumer sentiment disappointed, "that was a catalyst for a stronger dollar selloff."