After many years of trading, I've been pondering one question: what exactly is a true trend? This question has troubled me for a long time, and I believe it has also troubled most traders.

The definition from Baidu Baike is too vague—"the development direction of things or people," sounds like nonsense. The truly meaningful definition of a trend I found in the "True Yin True Yang Trading Theory." According to this theory, the essence of a trend is very clear: after a true Yang appears, it's a bullish trend; after a true Yin appears, it's a bearish trend. Most people's idea of "following the trend" is actually just blindly running in a vague direction.

Interestingly, although the "True Yin True Yang Trading Theory" originates from traditional Yin-Yang philosophy, it is actually a quantitative theory. The core logic is: go short during a true bear market, go long during a true bull market, and wait otherwise. Waiting is often the hardest part, but also the most important.

I remember a lecturer who started teaching this theory was heavily attacked. This might reflect a certain aspect of human nature—we're used to mindlessly criticizing strangers' opinions, even when their intentions are good. It's okay to have opinions, but you should also bring your own ideas to the table; that's a sign of true sophistication.

Recently, I’ve been using this trend theory to manage my account (with a scale of 300 USD). Practical verification shows that there are indeed rules to follow. The key is to wait for the real trend signals to appear, rather than guessing what will happen next every day. It may sound simple, but executing it requires strong mental resilience.