The Japanese candlesticks provide a wealth of information with every tick. They appear to show turning points and continuation patterns without any indicators.
The basic candlestick:

The colour of the real body indicates whether the price closed higher than the open which will be a full body or an empty body if the price closes lower than the open.
In its simplest form a candlestick is considered bullish if it is empty and bearish if it is filled.
Long bodies show a continuation in a certain direction while small bodies indicate uncertainty and may be a pause or a reversal.