Welcome, glad the site has been of help thus far, that's fantastic!
As for your question stock alert services CAN be profitable if you the trader know what you are doing. There is no proven system that can ultimately in the end make every buy and sell decision without your participation.
My personal advice would be to buy some books on investing and start your education there. Check out our list here on the site for recommendations. My personal favorites are by William O'Neil,
http://www.stocktradingtogo.com/2008...vesting-books/