Reuters/Charles PlatiauFrance is going to the polls on Sunday to vote in what is likely to be a highly contested presidential election. Four candidates, Emmanuel Macron, Marine Le Pen, Francois Fillon, and Jean-Luc Melenchon — are within percentage points of one another in the polls, but only two will advance to the run-off in May. The election has markets on edge as two of the candidates, Le Pen and Melenchon, have campaigned on euro-skeptic platforms. Le Pen, the leader of the far-right National Front party has said she would ask European leaders and the European Central Bank to replace the euro with a basket of new national currencies, in effect breaking up the single currency. "The euro is not a currency," Le Pen said in February.