The Gravestone Doji is a helpful Candlestick reversal pattern to help traders visually see where resistance and supply is likely located. After an uptrend, the Gravestone Doji can signal to traders that the uptrend could be over and that long positions could potentially be exited. But other indicators should be used in conjunction with the Gravestone Doji pattern to determine a potential sell signal. For example, a potential trigger could be a break of the upward trendline support.