Quote Originally Posted by f35c View Post
Mike, I don't think NASDAQ Global volume is the same as NASDAQ Composite. IBDs numbers are correct, they're using TAPE C, which is composite of all main US exchanges. Remember NASDAQ stocks can trade on other exchanges.
How do you know they are using tape C? If you look at the Nasdaq site I put in the article, you will find that MarketSmith and IBD will show that volume eventually. I don't suggest that I know what they are doing, just that they correct the NASDAQ chart to show "Total Share Volume" from the nasdaq.com Global Market Summary before the next trading day.