Assuming that you like IB platfrom for trading, and are looking to supplement it with charting SW, I would search for charting SW that is compatible with IB data feed, like:
http://www.quotetracker.com/index_nn.asp
or
http://www.amibroker.com/
Tradestation offers far more then just charting, ability to program your strategy and back test it, auto execution, etc.