Many retail investors have always struggled to understand where to enter the market; frankly, it's a lack of understanding of support and resistance levels. I’ve found that less than 10% of investors can accurately catch the bottom, and these people all share the ability to draw support lines. Today, I want to share how experts identify these key levels precisely.

The basic logic of support lines is actually very simple: when the price drops to a certain level, buyers see profit potential and buy heavily, causing the price to stop falling or even rebound. Drawing a line at this level is called a support line. Conversely, there are resistance lines, and from there, concepts like ascending support lines, trend lines, etc., extend. But support lines are fundamental; mastering them thoroughly makes everything else easier to understand.

How can you accurately draw support lines? Taking BTC as an example, first find the previous low point, then find a second low point close to the same level, and connect these two points with a horizontal line. The key is to see a third point where the price falls back to this line and then rebounds, which confirms it as a valid support line. Later, a dip near this support line becomes a buying opportunity.

But there's an easily overlooked detail here. Many people grasp the theory and go straight into buying, only to get trapped in a pile of accumulated positions. The effectiveness of support and resistance levels is not fixed; they can switch roles as the market changes. You also need to consider trading volume, trend lines, moving averages, and order book distribution. For example, key price points like previous highs and lows, round numbers, and historically significant levels all serve as support and resistance, but relying on just one factor is often not accurate enough.

The logic behind moving average support and candlestick support is the same. The 5-day, 10-day, and 20-day moving averages can all serve as references. My experience is that buying near support levels often allows you to catch the start of an upward move, but only if you consider multiple factors comprehensively. High-volume zones and areas with heavy trading activity are especially prone to forming resistance or support levels, and these positions often signal trend reversals or continuations.

In practical trading, the most important thing is not to stubbornly hold onto a support level. When a support is effectively broken, it turns into resistance, and vice versa. Combining other technical analysis tools and fundamental factors can improve your decision accuracy. Continuous practice and reflection will reveal how much these key levels help with risk management.