Gleaned from a daily price spreadsheet with historical data beginning in November 2000...

There have been five trading days with share volume higher than today's.

But there has been only one day with higher dollar volume than today... That was about 8 million shares on Nov 23, 2009 when the price was $3.83, for a dollar volume of about $30 million.

Today's dollar volume was about $24 million.

The next closest was yesterday, about $16 million.