The golden cross is a technical indicator that occurs when a stock's 50-day moving average crosses above its 200-day moving average. This is generally considered a bullish signal, suggesting that the stock's price may continue to rise in the short term. In the case of Ball Corporation, the golden cross has formed on its chart, which could lead to an increase in its stock price. However, it is important to note that seasoned investors do not blindly trade based on golden crosses and consider other factors such as price levels and company fundamentals.