If you know what a "trading system" is, then you'll love Collective2.

		If you create Trading Systems...
		Collective2 is a site where you can try out your system in real-life markets, without risking real money. Our software analyzes how your trades perform, using real-time prices. You can study your results and improve your strategies. Once you're happy with your trading system, you can sell "subscriptions" to your system in our marketplace. More details
		If you use Trading Systems...
		Collective2 is a site that cuts through hype and lies, and tells you how Trading Systems really perform. If you've ever seen an advertisement for a system that promises "astounding +300% results" - you know that the trading industry is full of hucksters and charlatans. Collective2 analyzes trading systems using real-time prices. Because we are an independent third-party, there's no way for vendors to "fudge" results. More details

We analyze over 250 trading systems. Look for the trading system that you like.

To create your own Trading System, just tell our computers what you want to trade. You won't be using real money, but we'll monitor your trades using real-life prices. If you are successful, you'll be able to get people to "subscribe" to your system and pay you.