I've been watching that too. Copper inventory is currently pretty high however.
The Greek vote this weekend along with a slowing US Economy and persistent industrial contraction in Europe could hit copper pretty hard temporarily.
Additional QE from the US and China should offset those negatives.
Could be an interesting window of opportunity between the Greek vote this weekend and the Fed meeting next week.
Additional quantitative easing will drive the price of all metals upwards.
It pays to have a position in favorite producers and near term producers!