The Grid is your one-stop sorting/searching resource on C2. It's a pretty robust feature so it will take some hands-on experience to really get the full benefit of it, but to help with the learning curve, I'd like to point out a couple of things to you:
1) You can customize The Grid to show the columns that really interest you and hide the ones that don't. Under the tabs (ALL, Stocks, Forex, Futures, Options) you will see an orange wrench. See attached screenshot. You have the ability to save your changes and name the custom filter for future reference.
2) For example: If you are looking for day trading systems. Typically day trading systems will have an average of >1 day trade length. You can use The Grid to filter systems by "Avg Trade Length". You can always confirm your findings with the system vendors themselves.