RE: Today's volume ?22 Sep 2021 19:31
I think it is the two 6,250,000 trades at 12:18. One was negative so it cancelled out the positive one, but on advfn they have both been added in as positive, so advfn shows 13,000,000 more trades than it should (53,000,000 as against the correct value of 40,000,000).