Candlestick charts use the same data as bar charts but represent the information slightly differently.
Traditionally, candlesticks are shown in black and white, but many charts use colours instead.
A white (or green, or blue) body signifies a day in which the price has increased.
A black (or red) body signifies a day in which the price has decreased.
The body of the candle itself shows the open-to-close range.
The wick of the candlestick shows the day’s full range.