The Doji candlestick pattern is made up of a candlestick that goes both postive and negative, but ultimately closes at the same price of the open. A doji indicates indecision in the market, in that the currency pair edged higher, but ultimately closed at exactly the same price of open. Typically these are found at the top and bottom of charts, due to opposing forces of the market.
Here is an example of the doji candlestick pattern:
