The Doji Candle Pattern
Pattern suggests long shadow and no body & also the meaning is trend coming to an end. whether it is from bearish to bullish or from bullish to bearish. Also use your fundamentals for more confirmation of the pattern like wise RSI, Support and Resistance, Fibonacci levels or the indicators and price action etc.
The main thing is selection of the chart as per your choice of trade. Money management and Risk to Reward Ratio is the key to apply.
Doji have mainly three type 
as the reference fig shows. it can be Rickshaw Man Doji, Gravestone Doji and Dragonfly Doji.
It's mainly a trend reversal pattern. Main interpretation is that the preceding trend is losing the traction.
some of the example are shown below, you can comment if you want to know more about it.
All the images are taken from Google images and they are used as the references only.