I'm pretty new to trading, I've been looking at different coin charts on cryptsy and I've noticed that a couple of the older coins that haven't had a rise in price in a while have recently had sudden, large increases in volume. These increases have sustained themselves for over a month now, while price has stayed even or dropped. What would make this happen, and is it a good or bad sign (or neither)? This is an example of what I mean, you can see the dramatic jump in volume over the last couple of months:
http://i.imgur.com/noSGyKK.jpg