A long body represents a large price difference between the opening and closing prices for the period. Notice that the body can be either white (bullish) or black (bearish) as shown. A Long Body is also called a Long Day.
A short body represents a small price difference between the opening and closing prices for the period. This also applies to both white (bullish) or black (bearish) candlesticks. A Short Body is also called a Short Day.

