Offer your thoughts or opinion on the input financial query or topic using your financial background.

How does one determine the width of a candlestick bar?
You could theoretically use any time period unit, but 1 minute and 30 minute  seem to be the most common and useful.  Especially for active traders.  This also has the added advantage of giving you useful insight into the trade volumes throughout the day; assuming that is also included on the chart.  I think most include that as a bar chart across the bottom. Here is a great example for crude oil on dailyfx:  https://www.dailyfx.com/crude-oil Notice that the chart has time options at the top left which include 1 minute, 30 minutes, 1 hour, and 1 day.