well.... if we were cheating with volumes.... we would have bigger volumes in order to attract customers don't we?

The problem is that now the Rock Trading has to pay a part of the fake profits from the fake fees to their scammed investors. A higher volume would force them to pay more to the investors.
It's also partly because of this that he is changing their orderbooks, removing the massive ones and diminishing the volume.
The other reason is to better hide the scamming orderbooks.
I'll be posting more evidence of this.