Bar charts

Charts that are used in technical analysis for stock trading. These charts are constructed from the high, low, open and closing price that occurred during the time Interval of the bar. For Example, on a 30-Minute Bar Chart:
The opening price appears as a dash on the left side of a bar. The highest price reached during the 30-minute interval appears as the top of the bar. The lowest price reached during the 30-minute interval appears as the bottom of the bar. The last price or closing price at the end of the 30-minute interval appears as a dash on the right side of the bar.