Candlestick charts are two dimensional bodies that depict the trading range of a stock. A candlestick has a real body, which is composed by upper and lower shadows. See images below:

The black candlesticks below should be red candlesticks (candlesticks that close lower than the open). A Black candlestick (see image above) represents a close lower than the open, but higher than the previous closing day.

A bullish reversal indicates a new upward trend is possible. A bearish reversal indicates a new downtrend is possible.

Abandoned Baby (A high bullish reversal): The first day is a red candlestick. The second day is a Doji gapping downward. The third day is a white candlestick gapping upward. The shadows on the Doji must completely gap below the shadows of the first and third day.

Engulfing (A moderate bullish reversal): A white candlestick engulfing the real body of the first day.

Hanging Man (A moderate bearish reversal): A black candlestick that moves significantly lower after the open, but rallies to a close well above the intraday low. If this candlestick forms during a decline, then it is called a Hammer.

Hammer (A moderate bullish reversal): A small real body with a lower shadow (at least twice as long as the real body) and no upper shadow.

Harami (A low bearish reversal): The first day is a long white candlestick. The next day is a red candlestick where the real body is completely engulfed by the real body of the first.

Harami Cross (A moderate bearish reversal): A two day pattern similar to the Harami, but with a Doji in the second day.

Morning Star (A high bullish reversal): The first day is a long red candlestick. The second day is a small candlestick gapping downward. The third day is a white candlestick.

Rising Three Methods (A high bullish continuation): A long white candlestick is followed by three small body days, each fully contained within the range of the high and low of the first day. The fifth day is along white candlestick with a close higher than the first day.

Three Inside Up (A high bullish reversal): A bullish harami occurs in the first two days. The third day is a white candlestick with a higher close than the previous day.

Three White Soldiers (A high bullish reversal): Three white days occur, each with a higher close than the previous day.

Upside Tasuki Gap (A moderate bullish continuation): A continuation pattern with a long white candlestick followed by another white candlestick that has gapped above the first one. The third day is red and opens within the body of the second day, then closes in the gap between the first two days, but does not close the gap.

"Images courtesy of StockCharts.com"