Going into the close of trading on Tuesday, a good stock remained good, a bad stock stayed bad, and a trio of stocks moved from "average" to "avoid."

Our Short Term PowerRatings Upgrades and Downgrades table lets short term traders see the largest changes in Short Term PowerRatings as those changes happen intraday. Our Upgrades and Downgrades table, which updates at 10:30 a.m., 1:30 p.m., and 3:45 p.m. Eastern, is a good way for traders to find out if a stock that began the day with a high Short Term PowerRating is still a good opportunity.

Traders looking to short stocks can use the table to make sure that the low PowerRating stock they wanted to bet against last night is still showing a low PowerRating, signifying that the stock may have moved too far too fast.

We are big fans of buying weakness and selling strength. And one of our favorite forms of weakness to buy is intraday weakness. Often, when stocks reverse and begin moving higher, the change in sentiment from bullish to bearish occurs after yet another bearish session has begun. For traders who look to buy with a limit order below the previous day's closeâ€"