hi Jeba, 

you mention that you don't have time to make your own system -- will you have the time to trade one that you buy?  Unless you hand your money over to a manager, everything in the market takes time and energy to execute.  Much more time.

When looking for prepackaged systems ask for a 3 year live history of real time trades.  As for a real time equity curve.  That will narrow your selection down to nearly nil.  A few questions to ask yourself:

1.  How long of a holding period am i looking for.  I'm guessing you're not looking for a daytrading system.  If you don't have the time to create your own system you definitely don't have the time to day trade.

2.  How much capital will the system be trading

3.  How many simultaneous trades will you be managing?

4.  What type of a drawdown can you comfortably withstand?

5.  Will you be looking for a trend trading system or a counter trend trading system?

6.  Do you want to know how the system works or are you okay with a 100% black box system.

Those questions were just off the top of my head.  Others may be able to provide more insight.

Good luck in your search.

David John Hall