Recently, while organizing my trading notes, I came across the old topic of MACD parameters again. Many people ask me why I don’t just stick with the default 12-26-9, and instead experiment with other parameter combinations. Honestly, it depends on your trading style, but the underlying logic is actually quite interesting.

First, let’s talk about how MACD works. This indicator has three core components: the fast line uses EMA(12) to capture recent momentum, the slow line uses EMA(26) to observe long-term trends, and the signal line is EMA(9) that generates trading signals. The default 12-26-9 is widely adopted because it’s stable, and most traders use it, creating an invisible consensus effect. When key signals appear, they attract a lot of investor attention, which in turn increases the credibility of the signals.

But that doesn’t mean it’s the best fit for everyone. Cryptocurrency markets are highly volatile, and sometimes the 12-26-9 reacts a bit sluggishly, especially for short-term traders. I’ve tried a set like 5-35-5, which is much more sensitive and can catch price movements faster. The downside is that it also produces more noise, with signals appearing frequently and then failing immediately, which tests your judgment.

Last year, I backtested six months of daily data on Bitcoin, and the differences in MACD parameters were quite clear. The 12-26-9 produced 7 clear signals in that period, with 2 successful breakouts after golden crosses, but 5 failed. Using 5-35-5, the number of signals doubled to 13, but only 5 of those led to significant price moves; the rest were small fluctuations. During the April 10 rally, both sets caught the move, but the 5-35-5’s death cross appeared earlier, which meant some profits were eaten up.

Many people, after adjusting parameters, start to believe in the concept of the “optimal parameters.” I have to pour cold water on that—this is a trap. Overfitting means tuning parameters based on past charts, but in reality, it’s like writing an exam based on the answers you already have; it’s not applicable to live trading. Markets change, different timeframes and assets have vastly different characteristics, and no single set of parameters can work perfectly in all situations.

My advice is to start with the default 12-26-9 and observe for a while. If you find it’s not sensitive enough for your trading logic, try 8-17-9 (more responsive but noisier) or 19-39-9 (more stable, suitable for swing trading). Once you pick a set, backtest it with your trading strategy to see if the data aligns, then consider live trading. The key is to develop a review habit rather than frequently changing parameters.

Someone asked if it’s okay to use multiple MACD parameter sets simultaneously. Yes, but it will generate more signals, so you need to be able to judge which ones are genuine. I’ve seen traders use two sets to filter out noise, and it works pretty well, but it requires experience.

Ultimately, MACD parameters don’t have an absolute answer—they only have what’s suitable for you. Beginners should stick with the default 12-26-9, and once they’re more familiar, fine-tune based on their habits. Don’t get trapped by tools; indicators are just aids. The core of trading is your logic.