The volume today should be great for the share price. Since Feb 12th when the stock drove up from $3 to $3.35, we have been range bound, with a top end of the range of $3.35 as you can see by this chart: http://finance.yahoo.com/echarts?s=PRB.V+Interactive#symbol=prb.v;range=20140212,20140305;compare=;indicator=volume;charttype=area;crosshair=on;ohlcvalues=0;logscale=off;source=;

We are not even at 3pm today and we have already traded 1.5% of the outstanding shares. I assume, much of the 1 million shares is a fund divesting a portion/all of their holdings which it probably started to do over the past month, but found willing buyers today. Funds are pretty clever at not tanking a share price, but instead as seen above we were range bound as they executed their sell. I assume that once we eat through this fund's PRB shares, we will be off to the races again.