I too have been adding to my long position along the way, and haven't sold yet. (other than my attempt to gain more shares as the CE came out, which failed and I ended up coming out behind). It is too tricky to try to buy on a down swing and pick it back up on a upswing. I ended up chasing the price down and then chasing it up, resulting in less shares than when I started. So now I am just holding and adding on as more funds become available. I think that is the best strategy.