if you think an exchange platform is doing this with "fake volume" then you should stop using that platform and switch to others.
fake pump is a different story though. it is hard to spot and it is not fake volume, it is fake hype and it attracts newbies to buy into their buy orders. it is going to be a long comment if i want to start explaining, and most of what i'd say is going to be mostly guesses not hard facts but based on evidence.
anyways just make sure to buy before the pump instead of after.
don't even get me started on Yobit and how they fake pump
they pumped a coin to 8,056,310% once
https://bitcointalksearch.org/topic/coinmarketcapcom-seriously-needs-to-delist-yobit-1780445
not to mention the lower than allowed order size orders