European Central Bank (ECB) headquarters in Frankfurt, Germany.

The euro slid against the dollar and yen on Wednesday as investors booked profits in the aftermath of weeks of sharp gains the day before a European Central Bank meeting that has the potential to sway the direction of the currency.

The euro will likely fall if ECB President Mario Draghi, during a press conference following the central bank's monthly policy-setting meeting on Thursday, voices concerns about the recent swift and sharp rise of the currency.