Each day on a candlestick chart is represented by a symbol resembling a small candle (hence the name): a vertical rectangle that can be black or white with a small vertical line sticking out of the top, the “shadow” (or “wick” to persist with the candlestick metaphor). Unlike real candles, there is another vertical line or wick sticking out of the base as well! The vertical axis on a candlestick chart represents share price, so the tops and bottoms of the rectangle and wicks represent price values.