AA and CENX showed up on my momentum scans today not because they had big moves, but because the overall strength of their trend is so strong. It's generally a good thing for the general markets when this sector is doing well and we can often expect the markets to continue to rise. Trends don't turn on a dime and while in the short term they may be a little overbought these trends can go on for far longer then we can imagine.

AA - with a weekly RSI of 88 this is definitely overheated. A pullback in the $13-14 range should be the perfect area to add to this if you were wanting to buy this stock.

CENX - same deal as above, but look for a pullback to the $14-14.50 range.

Weekly charts of Dow Jones and Aluminum stocks