Recently, I saw someone in the community asking what the divergence rate is, and it reminded me that when I first learned technical analysis, I also got stuck on this indicator. So today, I want to share my understanding of it.

Simply put, divergence means deviation. The divergence rate indicator is a tool used to see how far the price deviates from the moving average. Think about it, the price can't stay right on the moving average every day; the market naturally fluctuates. But the key point is, when the price is too far from the moving average, it usually reverts, and that’s the core logic of the divergence rate.

The calculation is actually simple; the formula is: Divergence Rate = (Closing Price of the Day – N-day Moving Average) ÷ N-day Moving Average × 100%. A positive result is called positive divergence (premium), and a negative result is negative divergence (discount). For example, if the divergence rate is 3, it means the price is 3% above the moving average.

My experience is that the divergence rate itself doesn't have an absolute "extreme" threshold; it depends on the market you're trading. For example, with the S&P 500, I usually consider 3 to 5% divergence as extreme; Bitcoin, due to its high volatility, might need to reach 8 to 10% to be truly overextended; for relatively stable assets like gold, 2 to 5% is enough. So the first step is to backtest your trading target and find reasonable extreme value ranges.

In practice, I most often use two methods. The first is combining extreme divergence with candlestick reversals—when the divergence rate hits an extreme zone and a reversal candlestick appears, it’s a good entry point. The second is divergence signals, especially bullish or bearish divergence—when the price makes a new low but the divergence rate does not, it often indicates a bottom is near, and selling pressure is about to exhaust.

How to set the parameters? Short-term traders are advised to use 5-day or 10-day moving averages, swing traders use 20-day, and long-term investors use 60-day. The choice mainly depends on your trading cycle.

A very important reminder: never rely solely on the divergence rate for decision-making. Its biggest role is as a warning light, telling you that the price has deviated too far and may revert. I usually combine it with RSI or other indicators; for example, when RSI enters oversold territory and the divergence rate is also at a negative extreme, the signal becomes more reliable.

Also, if the market is in a strong trend, even a large divergence rate may not lead to an immediate reversion. The price might consolidate to burn off the divergence before starting a new upward wave. That’s why relying only on divergence rate can often lead to pitfalls.

In short, the divergence rate is a reminder of the market’s extreme conditions, but the trend is the main focus. Using this indicator wisely can help you find better positions in trading, but only if you understand its limitations.