Each trader determines the time it takes to form a bar on their stock chart. The only limitations are those of the charting software you use. Some software may limit your choices to a handful of options, such as five-minute, one-hour, one-day, one-week, and one-month bars. Others may allow you to fully customize bar time frames down to the second. It may help to occasionally change time frames and consider the price action from a variety of contexts.