We commented on this at the time (almost 2 weeks ago now), i believe this is from BitGo?
A BRL exchange put out bad data and a bug in our sanity checks let it pass briefly because it was the only local currency market at the time. This logic has since been reworked.
Yeah, it was from Bitgo, this is a dangerous issue since some exchangers trust you with your data.
At least we can learn from this bug to add velocity settings.