Taking this a step further, you have to also note how long the wicks are because this can be an indication of what the market is doing. The body represents the open and close, but the wicks indicate the full trading range for that given period. When you look at the range, you may also want to look at the volume levels compare the surrounding candles. With a large body and an influx of volume, this could indicate indecision in the market. Similarly, if the volume is lower, this could mean the market is uninterested in the product.
Candlestick charts allow the user to view open, highs, lows, and closes for any given period they choose. The style of the candles can also tell a story depending on what you are looking for. With short line candles, it can tell you that the market may not know where price wants to go. A short line candle is when a candle forms and there is a short body, indicating that the open and close are similar, cause the body to be small.