BALTIMORE ( Stockpickr) -- While the first two weeks of May have proven difficult for investors and traders alike, it's one thing to say that gains are nonexistent right now -- and another to say that they're merely hard-fought. Indeed, while this is certainly not a market in which traders are "easily" tacking winning trades to their logs, the regular rules still apply.We saw that just last week with a breakout trade in MGM Resorts ( MGM) that netted in excess of 7% since while the broad market sank like a stone. This week, we'll seek out more of the same by looking at the technicals on some of Wall Street's highest-volume stocks. In case you're not familiar with technical analysis, technical charts are used every day by proprietary trading floors, Wall Street's biggest financial firms and individual investors to get an edge on the market. And according to some sources, skilled technical traders can bank gains as much as 90% of the time. Related: 5 Uptrending Stocks With Short-Squeeze Potential Every week, we take an in-depth look at large-cap stocks that are telling important technical stories. Here's this week's look at the technicals of five high-volume stocks, including Citigroup ( C) and AT&T ( T).