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Making trades, the most frustrating thing is not being able to understand the trends. In fact, there are three types of trends: rising, falling, and sideways fluctuations. To put it simply, this thing relies on market intuition. The market can't always rise, nor can it always fall; after a prolonged trend, most of the time it will consolidate for a while before it starts to decline.
If you can't tell whether it's going to rise or fall after a consolidation, then take a good look at the trend lines. If it breaks through the trend line, then buy; if it breaks down, then sell. As long as you strictly follow these rules, the probability of winning can be much higher.
The worst mistake is blindly chasing rises and selling on drops, especially in a fluctuating market. It keeps bouncing up and down; if it rises, it might immediately fall next. Can you really just chase after buying when it goes up? If it falls and you panic and open a short position, it could bounce back up again. This back-and-forth is a fatal mistake that contract traders often make.