The past few months of experimenting with scripts to make buy/sell signals from the MtGox ticker has generated some interesting results. Making a web platform to do the same sorts of experiments opens a door for daytraders, finance 'quants', and interested bitcoiners to try their own experiments. Now that the site is usable, I'm announcing it here.
CoinThink is a platform for experimentation and measurement of trading algorithms. Algorithms are written in javascript and run on cointhink.com for an introductory price of 0.01BTC/week.
This swing-trade script buys and sells when the price changes favorably by at least 0.2% from the last buy or sell. It runs with every new ticker notice from MtGox, and its last trade was Aug 13. Note that trade order execution is simulated and all javascript code is published (private scripts are a future feature).
Scripts start with an inventory of 1.0 virtual BTC and $0 virtual USD. Scripts are ranked based on their total inventory value on the leaderboard.