A gravestone doji is a specific type of candlestick pattern used in technical analysis of financial markets. It appears when the opening and closing prices of an asset are nearly the same, but the price reaches a significantly higher point during the trading period. This creates a long upper shadow and little to no lower shadow, resembling a gravestone. This pattern typically indicates a potential reversal in the market trend, suggesting that buyers pushed prices up but were unable to maintain that momentum. Traders often interpret a gravestone doji as a sign of weakening bullish sentiment, signaling a possible shift to bearish conditions.