As a visual pattern, three white soldiers indicate the reversal of a downtrend, while three black crows indicate the reversal of an uptrend. In terms of volume and confirmation from other indicators, both patterns require the same caveats.
After a downtrend, the Three White Soldiers pattern is formed, which indicates a bullish reversal. Candlestick patterns consist of three long bullish bodies that do not have long shadows and are open inside the previous candle's body.

The Three White Soldiers is a bullish candlestick pattern in technical analysis, signaling a potential reversal of a downtrend. It consists of three consecutive long-bodied green (or white) candles, each opening within the previous candle's body and closing higher than the prior day.

Key Features:
Strong Buying Pressure – Each candle closes near its high, showing sustained upward momentum.

Progressive Gains – Each session opens higher than the previous open, confirming bullish dominance.

Downtrend Reversal – Occurs after a prolonged decline, indicating a shift from bearish to bullish sentiment.

Confirmation:
Supported by rising volume for higher reliability.

Often followed by further upward movement.

Traders use this pattern to identify potential entry points for long positions.