The only explanation I have (which is probably wrong!) is it is consolidating. The fact of the matter is ANW had an enormous run since January (up in the 50% range I believe, or close). And stocks do retrace after these type of run ups before they move higher again.
The sad thing is if you look at all of this from a two year time frame, it is INCREDIBLY under valued. At least in my humble opinion. ANW sure looks solid.