Well, since it's from "Interactive Brokers", a good site to try might be their actual website...but, in the interest of saving time, here it is: http://individuals.interactivebrokers.com/en/p.php?f=programInterface&ib_entity=llc
there is some examples in TWSAPI yahoo group(not sure, if there is any code for placing the order "automatically" http://finance.groups.yahoo.com/group/TWSAPI/files/TWS Excel Example File/ you undestand that "automatic" part should come from you, do you?
Yes, the issue is : what does automatic mean ? 1) push a buy/sell button 2) buy/sell based on a formula or algorithm 3) ???
Use IB's API, you can send orders and auto-trade if you want. For anything but the simplest system, if you don't know how to program, you'll need to learn. kztd