If you buy or sell stock based on what is said on these gossip boards, you will lose money. Plain and simple - these people are not investment advisers, they are trying to make money just like you. You are in competition with them, so you need to make your own decisions on your own due diligence.
One of the best ways I have found to evaluate a stock is to check its 3, year, 2 year, 1 year, 6 month, 3 month charts. Figure out where the peaks and valleys are, how often they happen, and use that to decide when to buy or sell. Too many people buy on peaks, then are disappointed when they lose money. If you know where the valleys are, you will know when to buy.
News 
Market Data 
Discover 
