After reaching an important support level, Vistra Corp. (VST) could be a good stock pick from a technical perspective. VST recently experienced a "golden cross" event, which saw its 50-day simple moving average breaking out above its 200-day simple moving average.Considered an important signifier for a bullish breakout, a golden cross is a technical chart pattern that's formed when a stock's short-term moving average breaks above a longer-term moving average; the most common crossover involves the 50-day an ...