Recently, I’ve noticed that quite a few people in the community are still a little confused about the concept of ATH. In fact, this term shows up extremely often in trading. Let me share my understanding and practical experience.

ATH stands for All Time High. In simple terms, it refers to the highest price that a certain asset has reached from the time it started trading to now. Many beginners think that when ATH appears, it’s a buy signal—but actually, it’s the opposite. When I first entered the market, I took a loss at the ATH level. I bought at the highest point and then watched the price plunge right before my eyes. It really felt awful.

What does it usually mean when an asset reaches ATH? First, market sentiment has reached a peak, and the bullish side’s strength is at its highest. But this also means that risk is building up. Many people don’t understand what ATH means. They only see the price making new highs and then blindly chase it, and the result is often getting stuck in a losing position. My current approach is that when price is nearing ATH, I become even more cautious.

How do you trade at the ATH level? I’ve learned a few practical techniques. First, use technical analysis tools to confirm the trend. Fibonacci and moving averages are what I use most often. Think of the market like a spring: to reach new heights, it usually needs to go through a period of pullback and adjustment to gather momentum first. Common Fibonacci retracement ratios—such as 23.6%, 38.2%, 50%, and 61.8%—often act as support and resistance levels on charts. Moving averages help me judge the direction of the current trend.

A price breakout above ATH typically goes through three stages. The first is the “Action” stage, when the price breaks resistance and comes with a higher-than-average trading volume. The second is the “Reaction” stage, which usually appears when the upward momentum starts to weaken. As buying pressure declines, the price may pull back. The third is the “Resolution” stage, where the final confirmation is made about whether the trend is truly valid. I’ve found that many people get shaken out during the second stage—yet that’s exactly when patience is being tested.

My own trading rules are as follows. First, identify the candlestick pattern below the breakout point—usually a rounded bottom or a square bottom. Then, use Fibonacci (from the lowest point to the breakout point) to find new resistance levels; levels like 1.270, 1.618, and 2.000 are ones you should keep an eye on. Most importantly, set profit-protection levels in advance, based on your own risk tolerance.

What should you do when the price really reaches the ATH level? It depends on your investment strategy. If you’re a long-term holder and you believe in the asset’s value, you can keep holding. But the prerequisite is to do proper analysis to confirm whether this ATH is temporary or a long-term top. Most traders choose to take partial profits, using Fibonacci extensions to gauge psychological resistance levels and decide how much to sell. Others also choose to exit everything when Fibonacci extensions line up with the ATH price—at that point, it usually means the uptrend may be coming to an end.

My experience is that instead of obsessing over whether to sell at ATH, it’s better to plan ahead. Scale out your position—decide when to add based on the risk-reward ratio, and only increase your position when conditions are favorable. That way, even if your judgment is wrong, losses can still be kept within an acceptable range.

The meaning of ATH is really crucial for our trading decisions. Have you encountered situations involving ATH levels in your trading? Feel free to share how you handle them—these experiences can be helpful for everyone.