In trading, greed amplifies the illusion of profit, and fear amplifies the panic of loss. The essence of trading is conquering yourself. When you're greedy, you can't see the risks; when you're fearful, you can't see the opportunities. One makes you add to your position at the top, the other makes you cut your losses at the bottom. The market hasn't changed, the candlestick chart hasn't changed, what has changed is the scale in your mind—when you're profiting, the scale tilts towards "more is possible"; when you're losing, the scale tilts towards "run for your life." But true trading is precisely about pressing down according to the rules while being torn between these two extremes. Take profits when it's time to take profits, no matter how much more is left; cut losses when it's time to cut losses, no matter how unwilling you are; stay out of the market when it's time to stay out of the market, no matter how much others are making money.