I use Arrow Trader Lite (the free version). In my opinion it's absolutely the best trading script ever written. It's better in building traffic, it's better in keeping trades alive. It has more features then many scripts you have to pay for. It's extremely fast (can handle more than 20M hits a day i believe). Return is based on not only productivity, bus also on return, % of proxy and % of US hits. The guy who has written the script is also a great help, if you have any problems with the installation or something, he will help you right away (even if you have the free script).
Some free scripts take 1% of the clicks, this script takes only 0,9% of the outgoing hits to trades.
You definitely should try it.
