Data interval

Data interval, or data resolution, refers to the interval used to create bars. It is the criteria used to determine when one bar ends (Closing price) and another bar begins (Opening price). Most people are familiar with daily bar charts in which the interval is one day—the bar opens in the morning with the beginning of the trading session and closes at the end of the trading session in the afternoon for each bar in the chart. However, you can use any interval for your chart including non-time-based intervals. There are three types of data intervals: time based, tick based, and volume based.