When there is something unusual in stocks it is very often marked by high trading volumes. In most cases such situations occure during market reversals. For example, in a bear market, high volumes happen at dips when most of the participants panick and a few big investors do the opposite.
Let us look at the charts below:
The first chart shows the price action of precious metals producers (GDX) and the second one relates to juniors (small PM producers, developers and explorers - GDXJ). Both charts have the same element - the last week was a period of the highest volume in history of GDX and GDXJ.
I do not claim this a bottom in these shares but definitely something important is happening in the whole PM shares sector.