Collective2 is a "marketplace" for trading strategies. Once you sign up for a free account, you can "shop" for trading systems that meet your criteria. Then, with the click of a button or two, you'll be able to "turn on" those trading strategies inside your regular brokerage account. Trades will perform automatically and, you'll have complete visibility into what and when something gets traded -- plus, you'll be able to "pull the plug" at any time if you don't like what you see.