> Candle sticks represent price action within a time frame.
> The body of the candle stick tells you when the price started and ended within a particular time frame.
> The wicks on top or bottom of a candle stick tell you what happened to price during that period. It shows you the range of the price action during that time.
The colors of candle stick: In general, red candle sticks denote price has dropped. Meaning price in that time ended lower (body of the candle) than when it started. Green candle sticks denote the opposite, price ended up higher than when it started.
The structure of the candle stick: The structure or overall picture of the candle stick tells you the summary of price action. For example here on the right, the HAMMER candle stick has a long wick below the body compared to the top (no wicks) and to the rest of the body of the candle stick. This tells you, strong buying pressure came from the bottom. Hence why the following candle sticks moved upwards.
What you see here are many individual candle sticks and together they represent price action (price movement) over a particular time frame.
This graphical representation on a candlestick chart is to help summarize what is happening with price. It tells you a story.