Excuse my ignorance, but why was this a nice close ? , most of...

Excuse my ignorance, but why was this a nice close ? , most of the volume was CXXT trades , so brokers buying and selling within clients in there house and looks like who ever is accumulating has made a move , Not a trade over 50 , so to me that says maybe the bidder making a move to accumulate , if it was a new suiter why not buy at more than 50 if you intend to lob a higher bid , Hope I'm wrong as i want as much as i can out of this , like we all do .. just my opinion DYOR