Well, I don't want to give away too much of what I'm doing - on one hand it doesn't really matter, but on the other I've had a life's worth of experiences of having employers & others take credit for my work... Basically it's pretty comprehensive employing brute-force, an expert system, optimization, portfolio management, statistics, and risk management. Some of the commercially available software I've seen does a part or two of this & maybe somewhere there's a system that does all of it. It's nothing I'll probably ever end up selling because if I'm uncovering market discrepencies that allow me to make money, then if many people make those trades, those trading opportunities will no longer exist. Besides, I've written other programs which have required a lot of work to make them universally usable and which require a lot of support - I'm not trying to add to my workload!