www.hsx.com/portfolio/history.php
Can't really put it in the portfolio page b/c you may have bought 5000 shares on one day and 5000 on another day. The portfolio page will give you an average of what you paid for a stock, the Trade History page will break it down into each transaction.
As for the 6/12/24 hour charts, that could be cool, but since HSX resets every 24 hours, it only makes sense to keep it the way it is.
If your ever looking for the Trade History, it's under the My Portfolio pulldown menu.