Re: Stock Watch Pro - if you love poorly written software that crashes frequently, you'll love it. Do a search of the archives for references to it (ignore the spam by the Crontech programmer) - seems to be a lot of other people who experienced similar quality problems.
AmiBroker is the most frequent updated T/A software around. New betas are released weekly. It has quite easy to learn language has a great user group at http://www.egroups.com/messages/amibroker and features advanced charting, backtesting/optimizing on multiple symbols and much more. And represents the best price/performance ratio.
Guys take a look at my alerts software at www.trade-ideas.com It should be able to do what you are looking for. I don't want to be self promoting so this is "my" company FYI, but we have had great feedback and welcome anyone to use it. Hope it works for you Dan