Nexa Resources S.A. (NEXA) reached a significant support level, and could be a good pick for investors from a technical perspective. Recently, NEXA's 50-day simple moving average broke out above its 200-day moving average; this is known as a "golden cross."A golden cross is a technical chart pattern that can signify a potential bullish breakout. It's formed from a crossover involving a security's short-term moving average breaking above a longer-term moving average, with the most common moving averages bein ...