A candlestick  is simply one segment of time, depending on the timescale you choose to represent on your chart. The purpose of candlestick charting is strictly to serve as a visual aid to prices and trading, the exact same information appears on an OHLC bar chart it is just represented slightly differently. The advantages of candlestick charting are.

Candlesticks are easier initially to interpret, and are a good place for beginners to start figuring out chart analysis and market movement.

Candlesticks are easy to use visually! Your eyes adapt almost immediately to the information in the bar representation. Visuals help with both studying and trading.

Candlesticks are good at identifying potential market turning points – reversals from an uptrend to a downtrend or a downtrend to an uptrend. You will learn more about this later.