I just watched a trader’s dilemma, and it’s quite representative. He said the hardest part isn’t making money, but deciding when to hold and when to take profits. Sometimes you take profits, only for the market to continue moving significantly, and you regret it; other times you hold on stubbornly, and the profits get wiped out, then you curse yourself for greed. This is actually a true reflection of Buffett’s famous quote: "Be fearful when others are greedy, and greedy when others are fearful."

This phrase sounds simple, but in practice, most people can’t really execute it well. I’ve observed many traders’ accounts, and their problems are often not with technical analysis but with psychological control. When the market adjusts, some panic and rush to exit, fearing profits will evaporate; others stubbornly hold on, hoping for a reversal, only to get deeper into the trap. That’s why the idea of "be fearful when others are greedy, and greedy when others are fearful" sounds easy in theory but is so difficult to implement.

I’ve summarized common patterns among unsuccessful traders, and there are basically four. First, take profits quickly and run; cut losses even faster — a typical fear-driven behavior. Second, add to losing positions, refuse to admit defeat, and hope to turn things around — also driven by fear but masked by greed. Third, chase the market when others buy high and sell low when others panic — completely lacking their own rhythm, driven by greed and herd mentality. Fourth, go all-in with heavy positions — another sign of greed. These traders might occasionally make some profits, but that’s mostly luck. The final outcome is usually a big loss that wipes out all previous gains.

So how can you truly understand and apply the principle of "be fearful when others are greedy, and greedy when others are fearful"? I think the key is to establish your own trading system. This system should have clear entry rules, exit rules, and money management guidelines. Most importantly, follow the logic of "cut losses short and let profits run." You shouldn’t trade based on feelings of greed or fear but act according to your system’s signals. That way, you can lock human weaknesses in a cage.

Interestingly, human society has evolved from agricultural civilization to industrial civilization and now to information civilization, but human nature has hardly changed over thousands of years. But this isn’t hopeless, because individuals can evolve. Professional traders, through continuous practice and reflection, have overcome their inner fears and greed, ultimately becoming market winners. This shows that if you’re willing to put in the effort to understand the market and yourself, you have a chance to stand out among many failures.

So my advice is, don’t rush to master the advanced skill of "be fearful when others are greedy, and greedy when others are fearful" right away. Start by respecting the market, establish a feasible trading rule set, and keep refining your understanding within a manageable scope. Only then can you truly grasp when to be greedy and when to be fearful.