Recently, while backtesting trading strategies, I discovered an interesting phenomenon. Many people are struggling with MACD parameters, especially trying to find that "perfect" setting. I’ve been down that road myself, and I later realized that there is no absolute answer to MACD parameter optimization.

Let’s start with the standard 12-26-9. This set of parameters is indeed the default on most platforms, used by the most people, and easiest to get started with. The fast EMA (12) captures short-term momentum, the slow EMA (26) looks at long-term trends, and the signal line EMA (9) filters out noise. Sounds perfect, but the problem is, for highly volatile markets like cryptocurrencies, sometimes it reacts too slowly.

I tried the 5-35-5 set, which significantly increased sensitivity, with more frequent signals. But this also brought more false signals. Last year, when backtesting Bitcoin daily data over six months, the 12-26-9 showed 7 clear signals, including 2 valid golden crosses. The 5-35-5, however, generated 13 signals, of which only 5 were valid. See? More signals, but the accuracy actually decreased.

This is the core contradiction in MACD parameter optimization: higher sensitivity makes it easier to catch turning points, but also introduces more noise; lower sensitivity is more stable but produces fewer signals, risking missed opportunities. The 8-17-9 setting is suitable for short-term trading, 19-39-9 for medium to long-term, and 24-52-18 for long-term investors. There’s no one-size-fits-all; it’s about what best matches your trading style.

I’ve seen many people blindly pursue the optimal parameters, falling into overfitting traps. They adjust parameters based on historical data until backtest results look perfect, but in live trading, they start losing money right away. The reason is simple: past market conditions won’t repeat exactly, and overly fitting parameters to historical data can become a curse for the future.

A wiser approach is to choose a set of parameters that fit your trading habits—like 5-35-5 or 8-17-9 for short-term, or stick with 12-26-9 for medium-term—and then conduct thorough backtesting and review. The key is to observe how this set performs within your trading logic, rather than blindly chasing the most perfect signals.

Someone asked me if it’s possible to use multiple MACD sets simultaneously. Yes, but that makes signals more complex, and you’ll need stronger decision-making skills to determine which golden crosses are truly valid. For most people, this actually increases trading difficulty.

My advice is for beginners to start with the default 12-26-9, get used to it, and then adjust based on your market observations. If a certain set performs poorly recently, try fine-tuning it slightly, but avoid frequent changes. MACD parameter optimization should be a gradual process, based on actual backtesting and market feedback, not an immediate pursuit of perfection.

Remember, there’s no such thing as the “best” parameters—only the ones that best fit your current trading style. Technical indicators are just tools; the real determinants of success or failure are your judgment and risk management skills.