I am doing some research and notice that the volume data in QuantConnect is not always consistent with other sources I can see. 

For example, AA has a daily volume of 31.781M on Dec 17, 2021 as I see from both TradingView and my broker data. However, the QuantConnect historical data shows 10,192,510. The difference is quite large. 

My questions are:

  • What's the reason behind the difference in volume
  • Anything I can do in QC to make the volume matches up to other sources?