Researching Wabtec (NYSE:WAB)

I owned a few shares of Wabtec (NYSE:WAB) about a month ago and am thinking of going into it again. This stock has kept ticking right on up even when the rest of the market has been going down. Also, my research shows so far that there is a growing institutional interest in this stock which would definitly explain part of why it has defied the last two strong pulls towards the bottom in the last two days in which the Dow has given back almost 300 points from the gain that it made over the last couple of weeks. I'm developing some strong convictions on Wabtec and think it could really fit into the overall scheme of my portfolio.