Tradestation is an automated trading platform where you program in routines that monitor the market in some near-real-time fashion and they make the decisions on when to buy or sell for you.
If you are an avid geek, up to learning a new programming language, and have some statistical analysis background, then this platform might be a good option. The goal is that you program your routines during relaxed off trading hours, back-test them against historical market data, and then once satisfied let them go to make all of the emotion-free decisions for you.
I personally don't know that I have the skill needed to protect my fortunes from what amounts to a complicated shell script but for others I'm sure it works fine, or at very least provides the allure of finding the "secret" algorithm to make millions. :)