#XRP ETF上线 In candlesticks, the pregnant line is a pattern formed by two candlesticks, with the following characteristic states:

- Formation: The first Candlestick is long, the second Candlestick is short, and the highest and lowest prices of the second Candlestick must not exceed the highest and lowest prices of the previous Candlestick, resembling a pregnant woman, hence it is called the Pregnant Line.

- Specific pattern classification: First, the Bullish Engulfing Line, where the previous candlestick is a long bullish candle, and the second candlestick is a small bearish candle; second, the Bearish Engulfing Line, where the previous candlestick is a long bearish candle, and the second candlestick is a small bullish candle; third, the Star Engulfing Line, where the previous candlestick is a long bullish or bearish candle, and the second candlestick is a doji.

- Size and Color of Entities: In the bullish engulfing pattern, the relative size of the two entities is crucial. The smaller the entity of the second candlestick, the greater the reversal strength of the entire pattern. The colors of the two candlestick entities are usually different, but this is not a necessary condition; the color of the second candlestick does not affect the judgment of the bullish engulfing pattern.