Interference with Streaming Stock Quotes

I was using Norton AV and had no problems. After switching to Avast my streaming stock quotes are recieving interference. They are coming through but in a very irratic way and not in real time. When I turn off Avast everything works fine. Help. Thanks.

Is this with 4.6.618? If you don’t have that version I suggest you get and install it and see if the problem is solved.

Is this in a special app, or via web broser? What is the URL?

Thanks
Vlk