Candlestick analysis can be very useful in understanding price action & price patterns. Since each candlestick indicates OHLC of the session. Candlestick charts with as low as 1 minute time frame are available.
One can understand volatility from the candlestick range (H,L), participation of Bulls/Bears from the Body size (O,C) and color . It is the most popular tool used by Technical Analysts.