Up first is Extra Space Storage ( EXR), a $5 billion self-storage facility owner. EXR has posted strong performance for 2013, rallying close to 19% since the calendar flipped over to January. That's more or less on par with the performance of the S&P, but it's a whole lot stronger than most REITs. That outsized relative strength looks ready to carry over to the second half of the year. >>5 Bargain Bin Stocks to Buy in 2013 That's because EXR is currently forming an ascending triangle pattern, a price setup that's formed by a horizontal resistance level to the upside and uptrending support to the downside. Essentially, as shares of EXR bounce in between those two technical levels, they're getting squeezed closer and closer to a breakout above resistance -- at $45 in this case. When that breakout happens, traders have a buy signal in shares. EXR's pattern isn't exactly textbook, but that doesn't change the trading implications in this stock. Momentum adds some extra confidence to EXR's ability to break out; 14-day RSI turned bullish just last week. After EXR clears $45, keep a tight protective stop in place.