Recently, I saw someone asking how to use KD divergence again, so I organized my understanding and want to share it with everyone.

The concept of divergence is actually something many beginners have heard of, but few know how to use it well. Simply put, it refers to a situation where the price and indicator move in opposite directions. Normally, when the price rises, the KD indicator should also rise, but if the price is making new highs while the KD is getting lower, that’s what we call divergence.

Why do so many people pay attention to divergence signals? Basically, because it can give an early warning. For example, in an uptrend, seeing a bearish divergence indicates that although the price is still rising, the buying momentum behind it is weakening, and the market could reverse at any time. This doesn’t mean it will immediately fall, but it tells you to be cautious about a possible trend reversal.

However, I have to be honest—divergence isn’t foolproof. Many people, when first using KD, only look for golden crosses to go long and death crosses to go short. While these crossover signals are intuitive, they can be easily fooled in choppy markets. The advantage of divergence is that it’s a leading indicator, providing early warning before a trend turns, whereas crossover signals usually react after the trend has already changed.

Judging a top divergence is actually quite simple. You just need to find two consecutive highs on the candlestick chart, with the second higher than the first, and then check the KD values. If the KD at the second high is lower than at the first, that’s divergence. For bottom divergence, it’s the opposite: the price makes a new low but the KD doesn’t follow downward, or even rises, indicating weakening downward momentum and a possible rebound.

But there’s a problem: divergence often fails. Why? Based on my observations, when the market enters a very strong unidirectional trend, the KD indicator can stay in overbought or oversold zones for a long time due to its calculation method. During this period, small fluctuations in the indicator may look like divergence, but they are actually false signals caused by the trend’s strength. Also, single divergence signals have limited value; statistical data shows that traders who jump in immediately upon seeing divergence don’t have a high long-term win rate.

If you trade stocks and cryptocurrencies simultaneously, you might also notice that divergence tends to be less reliable in the crypto market. There are three main reasons: crypto’s extreme volatility, where large trades in a short time can instantly reverse the indicator; 24/7 trading leads to stronger momentum continuation, making indicator reactions slower; and emotional factors like FOMO and FUD can invalidate any indicator signals.

To improve the success rate of divergence, I suggest remembering three key points. First, divergence signals should be used in conjunction with the trend on higher timeframes; for example, if the daily chart is bullish, then a bottom divergence on the 4-hour chart has a much higher success rate than a top divergence. Second, the location where divergence appears is more important than divergence itself. Top divergence near resistance levels greatly increases the chance of a decline because of real selling pressure; bottom divergence at support levels increases the likelihood of a reversal upward. Third, check whether the KD indicator itself has entered overbought or oversold zones. If a top divergence occurs when KD is above 80 (overbought) or a bottom divergence when KD is below 20 (oversold), these signals tend to be stronger.

Honestly, KD divergence isn’t suitable as an independent entry signal. It’s more like a warning sign, indicating potential danger ahead, but it can’t tell you exactly when the risk will materialize. My advice is to always combine divergence signals with trend direction and key support/resistance levels. If you’re still using KD, consider adding RSI as well, because KD reacts quickly and can generate noise, while RSI is more stable. When both KD and RSI show divergence at the same time, the probability of a trend reversal increases significantly.

Crypto users should pay special attention: due to the different volatility and trading characteristics, it’s recommended to start with higher timeframes, such as daily charts, for divergence signals, as their reference value is much higher than that of 15-minute charts. In summary, divergence is a useful tool, but don’t rely on it excessively. In actual trading, it’s important to combine multiple factors to reduce risk.