If you are interested in selling your trading advice, you first create a "trading system." Collective2 tracks results by trading system, and customers subscribe to particular systems. You may create as many trading systems as you like.
In general, trading systems are organized around general principles or philosophies ("buying when things are oversold"), but they do not have to be. Opportunistic traders may simply want to create a "system" which is not really a system at all -- but is rather a set of recommendations and picks by one person.
Let's start by filling out information about your trading system. Don't worry too much about your answers; you'll be able to change them later.
And - remember - it's absolutely free to start a system and begin entering trades. So there's no risk to try it.