Clay shows up on volume swells and volume swells alone. I know this because I am a part of his trading group. I don't trade based on his recommendations. In fact, I barely follow him at all anymore. I dont have the time to be a trader as it requires quite a bit of flexibility. My career takes precedent over trading a few pennies.
Anycrap, Clay and crew use volume indicators, among others, as entry and exit points. Just watch, when CTIX does over 500k in volume, he'll show up. As soon as the volume dries up, he, and his group sell and move on.

I'm not knocking his strategy, as it has obviously worked well for him, again, I just don't have the time.