A bar forex chart gives traders a little more information than a line chart. They show closing prices but, at the same time, they also give low and high indications of opening prices.
Within each bar, the lowest part of the vertical line represents the lowest traded price for the specified currency pair during a certain timeframe. Similarly, the highest part of the line shows the highest traded price during the same timeframe.
Each of the vertical lines meets with two shorter horizontal lines. The one on the left-hand side shows the opening price for the chosen currency pair at a specific time; the one on the right-hand side shows the closing price for the currency pair at that time.