I agree, WSTL is setting up for a possible squeeze and have it on watch myself. Not going to move on it until after the ECB on Thursday or if it starts moving.
Chart is in a ending diagonal and the volume has picked up since the initial drop. The float is 60 million and is 25% short so you can see there's plenty of fuel for the fire should it get going. A look at the 60 min charts shows positive divergence developing increasing the chance of a possible reversal.