Short trading weeks like this Labor Day-shortened one are generally marked by lower trading volume, which is perfect for daytrading. As volume deceases, readers of Rocket Stocks can profit from intraday swings in the market -- so long as your stock ideas are good ones. It's our job to bring you such ideas.

With that said, I would lock in profits on

Apple

(AAPL) - Get Report

, up some 4%,

Thornburg Mortgage

( TMA), up about 4%, and

Cepheid

(CPHD)

, up 7%, as these stocks' catalysts have carried them higher.

This week's update also includes a few new stocks in the

Rocket Stocks for the Week of Aug. 27-Aug. 31

portfolio. Let's take a look at these new picks.

First up is

dELiA*s

(DLIA)

which just hit a fresh 52-week low. The direct-marketer and retailer of products for teenagers posted a wider-than-expected loss of 16 cents a share, while analysts were looking for the loss to stay flat year over year at 12 cents a share. At these levels, dELiA*s could snap back in the coming week. Certainly retail has been tough, but with a loyal niche market, dELiA*s teen customers are still going to buy -- especially with the school season in full swing. Estimates for the retailer's Logo Tee Shirts are too low; this also could be another catalyst for the stock.

Another stock worth looking at is

Amazon.com

(AMZN) - Get Report

, which has risen some 20% since the last time we recommended it as a potential rocket stock off of earnings. Amazon still has a fairly high short position compared to its earnings growth potential.

Many short-sellers feel that Amazon is very expensive, but this is not a short-term trader's worry. Let's not forget that Amazon crushed earnings the past two quarters -- sending shares higher 20% each time. With Christmas coming up and mega hedge fund Renaissance Technology loading up on shares, Amazon is a perfect short-squeeze candidate.

Just in case you missed out so far on this week's rocket stocks, check out the

Rocket Stocks for the Week of Aug. 27-Aug. 31

, which contains all this week's stocks with analysis for each pick.

At the time of publication, Altucher and/or his fund had no positions in stocks mentioned, although positions may change at any time.

James Altucher is president of Stockpickr LLC, a wholly owned subsidiary of TheStreet.com and part of its network of Web properties, and a managing partner at Formula Capital, an alternative asset management firm that runs a fund of hedge funds. He is also a weekly columnist for

The Financial Times

and the author of

Trade Like a Hedge Fund

,

Trade Like Warren Buffett

and

SuperCa$h

. Under no circumstances does the information in this column represent a recommendation to buy or sell stocks. Altucher appreciates your feedback;

click here

to send him an email.

TheStreet.com has a revenue-sharing relationship with Trader's Library under which it receives a portion of the revenue from purchases by customers directed there from TheStreet.com.