Last up is China Southern Airlines ( ZNH), a Gangzhou-based airline that carried more than 11 million passengers last year. Shares of ZNH have been trading in a triangle of a different sort for the past few months: a symmetrical triangle. Unlike the ascending triangles in LFC and YZC, a symmetrical triangle is a setup that's formed by trendlines that are converging at approximately the same rate. The trading strategy is essentially the same as they'd be in an if/then setup. You want to be a buyer if shares breakout above trend line resistance, or a seller if they break down below trend line support. A symmetrical triangle is unique because it shows us that there's a volatility squeeze taking shape in shares of ZNH. Because volatility is cyclical, moving from periods of high volatility to periods of low volatility, the implication is that a break outside of ZNH's channel will come in the form of a sizable move. That's why it's crucial to keep a close eye on shares now. When the breakout does happen, the 50-day moving average is a strong place for a protective stop. To see these plays in action, check out the Technical Setups for the Week portfolio at Stockpickr. -- Written by Jonas Elmerraji in Baltimore.