The Three Advancing White Soldiers is a bullish reversal pattern represented by three candles.

After a downward trend, every candle has a long body and an upward direction. 

This pattern is commonly found during downtrends and represents how the bulls react aggressively to the past price declines and push the price up. 

Usually, this pattern takes place when the price reaches a level where the demand is very present, which initiates a trend reversal and increases in price. Traders use this pattern to open long positions.