Recently, a friend asked me how to interpret moving averages. I found that many beginners tend to fall into traps here. Instead of looking at a bunch of complicated technical indicators, it's better to master moving averages first—this is the fundamental skill of trading.

First, let's explain what a moving average is. Simply put, it's the sum of the closing prices over the past N days divided by N, resulting in an average value. As time progresses, this average updates continuously, and connecting these points forms the line we see. It actually reflects the market's average cost over that period— the 5-day moving average is the average holding cost over the past 5 days, and the 20-day moving average is the average cost over a month.

Why look at this? Because it tells you where the market's current cost is and the trend direction. Short-term, medium-term, and long-term price movements can all be seen from the moving averages, making it a basic tool for judging bullish or bearish trends.

Regarding setting up moving averages, many people make the same mistake initially—filling the chart with multiple moving averages. The 5-day, 10-day, 20-day, 50-day, 100-day, 200-day all on the chart looks very professional, but in reality, the signals interfere with each other, making it hard to see clearly. The key is to match the moving averages with your trading cycle. For short-term trading, look at 5-day or 10-day; for swing trading, 20-day or 50-day; for long-term trends, 100-day or 200-day. They don't have to be exact days; I sometimes use a 14MA (just two weeks), sometimes 182 (half a year). There’s no fixed answer—you need to explore and find what works for you.

In practice, I usually keep just the 20-day and 50-day moving averages. When the 5-day moving average is rising and above the monthly and quarterly moving averages, that indicates a bullish trend. Conversely, if the 5-day is below, it's bearish. But more importantly, whether the price is above the moving average matters even more—if the price is above and the moving average is rising, I lean bullish; if the price drops below and the moving average is falling, I lean bearish or cautious.

The simplest way to find buy or sell points is to watch for moving average crossovers. When the short-term moving average crosses above the long-term moving average from below, it's called a golden cross, usually a buy signal. When it crosses from above to below, it's called a death cross, a sell signal. I often enter trades at these points, and the success rate is pretty good.

But there's a trap—moving averages are lagging indicators. The market may have already moved, and the moving average only reacts afterward. So I usually combine RSI or volume to confirm, avoiding chasing extreme levels. When the moving average, RSI, and volume all point in the same direction, the win rate significantly improves.

Another use is to treat moving averages as support and resistance. In a bullish trend, if the price pulls back to the 20-day moving average without breaking below, it bounces back—this is support. In a bearish trend, if the price rebounds to the moving average and gets pushed down again—this is resistance. The principle is simple: most people's costs are around the moving average, naturally leading to buying or selling pressure.

A inherent flaw of moving averages is their lagging nature; the larger the time frame, the more obvious this problem becomes. Plus, past performance doesn't guarantee future results. So don’t treat it as a万能 tool— a golden cross doesn’t necessarily mean prices will rise, and a death cross doesn’t guarantee a fall. The real purpose of moving averages is to help you stay on the right side of the trend, showing you where the current market cost is and which direction it’s heading.

My suggestion is: today, open your trading software, set only the 20-day and 50-day moving averages, find a market with a clear trend, and test the "trend-following pullback" strategy in a demo account for two weeks. You’ll find that moving averages are actually more useful than you think. There’s no perfect indicator—only an ever-optimizing trading system.