Here is one source that I use for this type of information. Its straight from the NASDAQ website. I check it most every day for SLTD information. Scroll down to the bottom half of this page and you will see the Support/Resistance info..
As for buying and selling (not to Mike but in general), stock trading is not for the faint of heart. My entire portfolio is taking a beating this past 5 or 6 days. Its just not a good time in the market now. Nay Sayers have been talking about a correction that is long overdue and people are getting nervous. But I believe, in the long term, that I have made good decisions and will be a lot better off than I am now. If you are a short term trader then I would take my profits and sell now until times are better.. but hey thats just me.