The Doji is generally considered the most important candlestick. The Doji often signals the beginning of a trend reversal, and is therefore very important to recognize. There are three special types of Doji
The Doji candlestick forms when a stock's open and close are the same price or very close to the same price. The length of the upper and lower shadows can vary, and the resulting candlestick looks like, either, a cross, inverted cross, or plus sign.
The Dragonfly Doji candlestick is a special type of Doji where the open and close price are at the high of the day.
The Gravestone Doji candlestick looks like an upside down “T”; the opposite of the dragonfly Doji. The Gravestone Doji has a long upper shadow and no lower shadow, and it forms when the open, low and close are equal.
The Long-Legged Doji is a Doji candlestick with a long upper and lower shadows with the Open and Close price in the middle of the day's trading range.
The Doji candlestick conveys a sense of indecision or tug-of-war between buyers and sellers. Prices move above and below the opening level during the session, but close at or near the opening level.