Recently, I’ve been looking into trading-related content and found that many people are still somewhat unfamiliar with the KDJ indicator. Actually, the meaning of KDJ is quite simple; it’s a technical indicator that helps us determine whether the market is overbought or oversold. What does it really represent? In simple terms, these three lines correspond to the fast line, slow line, and the direction-sensitive line, and their interactions are used to predict price trends.

I’ve noticed that many retail traders are using this indicator, and calling it one of the “Three Treasures of Retail Investors” is indeed justified. How to interpret the KDJ indicator? The basic logic is that the K line and D line indicate whether the market is overheated or too cold. When they are above 80, it signals overbought; dropping below 20 indicates oversold. The J line is used to measure the deviation between the K and D values.

In actual trading, the most commonly used signals are the golden cross and death cross. When the K line and D line both cross upward at low levels, that’s a golden cross, which usually means a buying opportunity is coming. Conversely, a death cross formed at high levels is a warning to sell. I’ve seen many traders catch many market moves relying on these two signals.

But what needs to be said is that the KDJ indicator also has its flaws. In extreme market conditions, it can become dull, and signals may lag behind, often producing false signals. I’ve seen many people get tricked into false breakouts in live trading, ending up losing everything. So, it’s crucial not to rely on it as the sole basis for trading decisions.

Another practical tip is to look for divergence at the tops and bottoms, as well as double top and bottom patterns. For example, if the price hits a new high but the KDJ is trending downward at high levels, that’s a bearish divergence, usually indicating a reversal is coming. The opposite applies as well. During the 2016 Hang Seng Index rally, many smart traders used these patterns to identify bottoms, perfectly catching the lows and enjoying the gains of the bull market.

In my opinion, the most important thing about the KDJ indicator is to combine it with other technical indicators. Relying solely on it can lead to pitfalls, but if you use it together with candlestick charts, volume, and other indicators for comprehensive analysis, its accuracy will be much higher. There’s no perfect indicator in the market; the key is how to use it flexibly, maximize its advantages, and avoid risks. Interested friends can try practicing on a demo trading platform first, using real trading experience to deepen their understanding of the KDJ indicator. Only then can you truly grasp its essence.