The characteristics of a downtrend are exactly the opposite of those of an uptrend. It is caused by a continuous decline in prices, where each wave of price decline continues downward, crossing previous lows. Even if there are price rebounds in between, they will not break through the high point of the previous wave of decline.
The high points of prices are continuously lowered, and the low points are also continuously lowered, creating a price trend that extends downward. In a downtrend, the time spent on price declines is greater than the time spent on price corrections, and the space of price declines is greater than the space of price corrections.