Candlestick chart is a chart with which is represented by candles, each candle is having Open, High, Low and Close(in short OHLC) prices for a particular timeframe.
If the chart is having these price points for a day then it is called daily timeframe chart, similarly trader use different time frame like for Intraday trading most traders use 3 min, 5 min or 15 min timeframe.
Best Books to read about Candlestick chart pattern:
Steve Nilson has written many books on candlestick pattern but I recommend Japanese cadlestick charting techniques, it is a wonderful read and give in depth knowledge about candlestick patterns.
We recomment below books for indepth knowledge about candlestick charting:
1. Japanese Candlestick Charting Techniques - Steve Nilson