These are some of the this morning’s top day trader alert stocks to watch based on pre-market and after-hours volume activity.  These have links through to more detailed trading and volume analysis covered at the Volume Spike site VSInvestor.com: Alcoa Inc. (NYSE: AA) shares are ones to watch for a volume spike higher after the company [[ This is a content summary only.

Tags: based-on-pre, covered-at-the, full-links, hgsi, higher-after, other-content, pre-market activity, pre-market-and, rigl, trading-and, tree