A doji candlestick forms when the open and close prices for a security are virtually equal for the defined time-frame. This is frequently taken as a reversal pattern by technical analysts, indicating a change in the price of a security is imminent. Alone, doji are considered a neutral pattern. But when looked at in a broader context, they can be strong signals about future moves up or down. Depending on where the open and close line is located, a doji is described as either gravestone (where the high is far above open/close price), long legged (where the open/close price is directly between the high and low prices), or dragonfly (where the low is far below the open/close price).