Given this relationship, absent tremendous global market stress, gold generally tends to move in an opposite direction from the U.S. dollar, or more specifically, the U.S. dollar index.

FORBES: What Will Influence The Price Of Gold In 2013?

While this recent run by the euro may be a bit overdone and price has stalled slightly ahead of the 1.2500 level, traders need to be very wary of this pair as the reaction to stress tests, positive or negative, could send it rocketing in either direction.

FORBES: Broad Dollar Weakness Lifts European Currencies