NASDAQ Volume Data

[f35c]

Thanks for helping me understand this. I brought the volume anomalies to IBD's attention, they are now evaluating a change to Tape C NASDAQ volume for the NASDAQ composite chart.

Mike, another site that's updated during the day, and clearly shows Tape C:
https://batstrading.com/market_summary/

The volume aligns with figures in the WSJ.com market data section.