Price charts can be simple line graphs, bar graphs or even candlestick graphs. These are graphs that show prices during specified time frames. These time frames can be anywhere from minutes to years or any time interval in between.
Line charts are the easiest to read, they will show you the broad overview of price movement. They only show the closing price for the specified interval, they make it very easy to pick out patterns and trends but do not provide the fine detail of a bar or candlestick chart.
With a bar chart the length of a line displays the price spread during that time interval. The larger the bar is the greater the price difference between the high and low price during the interval. It is easy to tell at a glance if the price rose or fell because the left tab shows the opening price and the right tab the closing price. Then the bar will give you the price variation. When printed bar charts can be difficult to read but most software charts have a zoom function so you can easily read even closely spaced bars.
Originally developed in Japan for analyzing candlestick contracts candlestick charts are very useful for analyzing FOREX prices....