The most feared thing in trading is not understanding the trend, which essentially falls into three categories: uptrend, downtrend, and wide-range oscillation. Simply put, it's about market sentiment. The market cannot always rise, nor can it always fall. In a prolonged market trend, subsequent movements are mostly characterized by horizontal consolidation, followed by a decline. After a period of consolidation, if one cannot distinguish the subsequent trend, relying primarily on trend lines is advisable. Breaking through can be used for going long, while breaking down can be used for going short. Strictly following this approach will significantly improve the probability of success. Blindly chasing highs and selling lows is the most terrifying strategy, especially during oscillating markets. The market itself oscillates repeatedly. If it rises and you go long, how can that work? If it falls and you panic and go short, it will rebound. This repeated torment is the most fatal mistake commonly made by traders.