Short interest and short volume are related, but they are not the same thing.
Short interest tracks the number of shares sold short that remain open at a reporting date. Short volume usually refers to the volume of shares marked as short during a trading session or reporting period.
One is about open positioning. The other is about trading flow. That difference matters more than many readers realize.
A stock can show heavy short volume without ending up with a large reported short interest position. It can also have a large short interest position without unusual short volume on a given day.
That is because short volume captures activity, while short interest captures what is still open at the report date.
Looking at one and assuming it stands in for the other can lead to bad reads. The two measures can complement each other, but they answer different questions.
Use short interest when you want to understand reported bearish positioning over time.
Use short volume when you want to understand how much short-marked trading activity occurred during a shorter period. Short volume can be more useful for short-term flow analysis. Short interest is usually more useful for tracking how positioning changes from report to report.
ShortInterestHistory.com is built around reported short interest, not short-volume feeds. That keeps the site focused on one clear dataset and makes the page structure easier to trust. You know what each number is trying to show.
If short-volume data is ever added later, it should be presented as a separate lens rather than blended into these pages in a way that confuses the distinction.