Recently studying technical analysis, I found that many people seem to have some misunderstandings about the MACD indicator. Today I want to share my understanding with everyone.

MACD stands for Moving Average Convergence Divergence, and in Chinese, it is called Smooth Moving Average with Different Convergences. Honestly, when I first saw this name, I was a bit confused, but after understanding its three core components, it all became clear. MACD mainly consists of three parts: the fast line DIF, the slow line DEA, and the histogram, each with its own function. Together, they help us capture price trends and buy/sell signals.

Let's start with the fast line DIF, which is the core of MACD. The full name is DIFferential Line. DIF fluctuates relatively quickly and can reflect short-term momentum changes in price. When DIF rises, it indicates that short-term momentum is strengthening, which is usually a good signal. In contrast, the slow line DEA (also called the signal line) is much smoother. Its role is to filter out noise in DIF and provide a more stable trend confirmation. Interestingly, when DIF crosses above DEA, we call it a golden cross, which is often seen as a buy signal; conversely, if DIF crosses below DEA, it’s called a death cross, indicating that it might be time to reduce positions.

Next is the histogram, which is derived from DIF minus DEA. The height of the histogram visually shows the gap between the fast and slow lines. When positive bars get taller, it indicates increasing bullish momentum; when negative bars get lower, it indicates strengthening bearish momentum. When the histogram gradually converges, it’s a warning that the trend might reverse.

After understanding the components, let’s look at how it’s calculated. MACD is based on the Exponential Moving Average (EMA). Compared to the Simple Moving Average (SMA), EMA gives more weight to recent prices, so it reacts faster. DIF is calculated as EMA(12) minus EMA(26). The 12 represents the short-term, and 26 the long-term; this difference helps us quickly judge trend strength. DEA is a 9-period exponential smoothing of DIF, further reducing noise. The histogram is simply DIF minus DEA.

I tested this with Ethereum’s real-time data: when EMA 12 is 4271.55 and EMA 26 is 3941.88, DIF is 329.67. Then, based on DIF and yesterday’s DEA, today’s DEA is 266.62, and the histogram is 63.05. The entire process is quite logical.

What left a deep impression was the death cross on December 9, 2024. I saw DIF crossing below DEA, and Ethereum subsequently retraced over 60%. If I had captured this signal in time, I could have avoided significant losses. Conversely, after the golden cross on April 13, Ethereum started a strong upward trend.

However, I must be honest: MACD is not foolproof. Some people ask, does a golden cross always mean a rise? The answer is no. No indicator can guarantee price movement in the financial markets. MACD also has lag and can include noise, so it’s best to use it together with other technical analysis tools. Additionally, MACD parameters can be adjusted—for example, (5, 13, 5) is suitable for short-term trading, while (50, 200, 20) is better for long-term analysis. The key is to backtest and adjust according to your trading style.

After reading all this, if you’re interested in MACD, I suggest opening your trading software, selecting a trading pair you like, adding the MACD indicator, and studying it more. Theory is just the foundation; real trading review and practice are what truly improve your understanding and application of the indicator.