Actually SGLB trades above average on most days for trade volume. The overall average of shares traded in the US as a percentage of outstanding shares for individual companies is only 0.37% of the outstanding. That would be somewhere around 22,000 shares for SGLB at 6 million outstanding. Most of the time when a stock trades many multiples of average, it is the same shares being traded back and forth over and over. But I suspect you already know this.