The most common mistake made by trading beginners is staring at the support line on the chart and then placing an order blindly. But in fact, the validity of support depends on how the price behaves.

First, let's talk about poor support. When the price hits support and gets pushed down, with a long upper shadow that looks intimidating. What does this indicate? Someone wants to buy, but can't buy much, and gets hammered down. Such a level is not sustainable.

Next is okay support. The price shows signs of a rebound, but the strength is average, still leaving an upper shadow. This situation indicates that there are buyers stepping in, but their capacity is limited, and the rebound isn't decisive enough. At this point, you should ask yourself a question.

Finally, good support. When the price reaches this level, it gets pulled up immediately, with hardly any upper shadow, closing high. This truly indicates that funds are supporting it, and this level is genuinely defended.

The core logic is actually just one sentence: only when you see a rebound can you confirm that support is valid. If there's no rebound, placing an order is essentially gambling.