Is there some sort of charting software available that allows users to enter parameters of their trading algorithm, i.e. when 30 day MA moves above 60 day MA and price is above 15 day MA, and uses it to generate buy or sell signals?
Amibroker. $279 to buy, and R140 per month for daily downloads - from http://www.investordata.co.za/index.html. They use AFL as a programming language, with tons of free stuff already availabe on the user groups.