Caterpillar ( CAT) is staging a textbook breakout in May. Shares of heavy equipment maker haven't exactly been kind to investors year-to-date; CAT has barely broken even during a time when the broad market has been in a historic rally. But a textbook breakout should change that. >>4 Stocks for Surging Natural Gas CAT started forming an inverse head and shoulders pattern back in early April. The inverse head and shoulders is formed by two swing lows that bottom out around the same level (the shoulders), separated by a lower low called the head; the buy signal comes on the breakout above the pattern's "neckline" level, which was just below $86 for CAT. That puts this stock's upside target right around $92. Even though CAT has nearly hit its upside target already (the post-breakout buying has been very quick), the longer-term implication for investors is a break of the downtrend that had been haranguing shares this year. Now, with that downtrend broken, CAT should have more room to move higher. I'd just expect some consolidation first.