Ethereum ($ETH) may appear somewhat weak in recent market performance. There may be many reasons behind this, but one key factor may be that the pressure of selling exceeds the buying pressure. By observing the weekly chart, we can find that the volume when the price is falling is significantly greater than the volume when it is rising, which usually indicates that sellers have an advantage in the market, which in turn leads to a decline in price.

When the price of Ethereum fluctuates between $2,100 and $2,800, many investors may choose to sell after making a profit of about 30%, and this profit-taking behavior may exacerbate the decline in price. In addition, as the price rises, the increase in buying forms the so-called dense chip area, which leads to a volatile market. In this case, investors either hold on or choose to sell under market pressure.

Next, let's discuss the symmetrical triangle rule in trading. In most markets, except for very few one-sided markets, price movements tend to follow a symmetrical principle, that is, prices will show a mirror-symmetrical shape over a certain period of time. This symmetry can help investors predict future price movements.

Finally, let's explore how to obtain trading information from candlestick charts. Whether it is a Yin line or a Yang line, the part from the Yin line's lower shadow to the closing price in the trend is called a down rebound, and the lowest point at this time can be regarded as a short-term support, which means an increase in buying volume. On the contrary, the part from the Yang line's upper shadow high point to the closing price is called a high-rise fall, and the highest point at this time is the pressure level. It is worth noting that the closing prices of the daily and weekly lines can also be used as support and pressure levels.

Take Ethereum as an example, the current price is around $263X. In the previous daily K-line trend, in the process of falling from $2728 to $2310, the lower shadow of the second Yin line was at $2650, the closing price was at $2675, and the lower shadow of the third Yin line was at $2634, and the closing price was at $2657. Therefore, in the rise of Ethereum, we can see that the price fell after hitting $2675. In the daily trend of $2150 to $2728, the $2675 high-falling Yin line is the so-called pressure line.

Through this symmetrical trading principle, investors can explore and apply pressure lines and support lines for trading.