Candlesticks contain the same data as a normal bar chart but highlight the relationship between opening and closing prices.
A candlestick chart is a style of bar-chart used primarily to describe price movements of a security, derivative, or currency for a designated span of time.
It is a combination of a line-chart and a bar-chart, in that each bar represents the range of price movement over a given time interval. It is most often used in technical analysis of equity and currency price patterns. They appear superficially similar to box plots, but are unrelated.