Recently, I’ve noticed many people get easily fooled by surface signals when trading with the KD indicator. In fact, there’s a more noteworthy phenomenon behind it called divergence, which is a true warning of potential reversals.

Let me briefly explain what divergence is. Indicators are originally designed to measure price momentum; the logic is straightforward—if the price goes up, the indicator should follow suit. But when you see the price hitting new highs while the KD remains stagnant or even drops, that’s divergence. When I first started trading, I didn’t realize how important this signal was until I suffered several losses and finally understood.

Why is divergence so critical? Simply put, it reflects market momentum weakening. For example, the price is still rising, but the KD is getting lower, meaning that although it looks like the price is still climbing, buying power is waning and a reversal could happen at any time. Divergence doesn’t tell you the price will reverse immediately; it’s an early warning that momentum is weakening, so you should be cautious.

Many beginners, when first using KD, only look for golden crosses to go long and death crosses to go short. Honestly, these crossover signals seem intuitive, but they are especially prone to false signals in choppy markets. Divergence is different; it’s a leading indicator that can warn you before a true turn occurs. Crossovers reflect the current relative position, while divergence shows the conflict between momentum and price—this difference is quite significant.

Divergence comes in two types. Top divergence occurs when the price hits a new high but the KD drops instead. The method is simple—find two consecutive peaks on the candlestick chart, where the second is higher than the first, then check the corresponding KD values. If the second peak’s KD is lower than the first, that’s divergence, indicating insufficient momentum.

Bottom divergence is the opposite: the market is falling, but the KD isn’t following down and may even be rising. This suggests the downward momentum is weakening and a rebound might be near. The method is the same—find two consecutive lows and compare their KD values.

But honestly, divergence isn’t foolproof. My experience is that during strong unidirectional trends, KD can stay in overbought or oversold zones for a long time due to its calculation method, causing divergence signals to fail. In a strong trend, the indicator will fluctuate with the price, creating high and low points that look like divergence, but are actually just a result of the trend’s strength.

Also, single divergence signals have a low success rate. I’ve seen many people jump into trades immediately after spotting divergence and end up losing big. Especially in crypto, where volatility is much higher than stocks, trading 24/7, and emotional factors like FOMO or FUD are prevalent, these can cause divergence signals to fail.

To improve the success rate of divergence, I’ve summarized three key points. First, trade in the direction of the larger timeframe trend. For example, if the daily chart shows a clear bullish trend, the success rate of bottom divergence on the 4-hour chart will be much higher than top divergence, because following the trend is always easier than trying to catch the top.

Second, the location where divergence occurs is more important than divergence itself. If top divergence happens near resistance levels or previous highs, the probability of a decline increases because of substantial selling pressure. Conversely, if bottom divergence occurs near support levels or previous lows, the chance of a reversal upward is significantly higher.

Third, check whether KD is already in overbought or oversold zones. If top divergence occurs in an overbought area (KD > 80), or bottom divergence in an oversold area (KD < 20), the signals tend to be stronger. Divergence at high levels indicates a shift from extreme heat to exhaustion, implying stronger downward pressure; divergence at low levels suggests a shift from extreme panic to optimism, increasing the likelihood of an upward move.

At this point, many will ask: does divergence necessarily mean a reversal? The answer is no. Divergence is just a warning that momentum is waning; there’s a risk of reversal, but it’s not guaranteed. So, never rely solely on divergence as an entry signal; always combine it with other technical analysis tools.

Crypto traders can also use divergence, but its accuracy tends to be lower than in stock markets. My advice is to start with larger timeframes, like daily charts, as their signals are more reliable than 15-minute charts. If you use both KD and RSI and see divergence signals on both indicators simultaneously, the probability of a trend reversal increases significantly.

Ultimately, divergence is like a warning sign from the market. When it appears, it indicates potential risk ahead, but it can’t tell you exactly when it will happen. In practice, always remember to combine divergence signals with trend direction and key support and resistance levels to truly improve your trading success rate. Otherwise, relying on divergence alone will only lead to more losses over time.