Here are couple of screenshots i took few days ago, as i was investigating the insanely high volume for a new small exchange:

https://cdn.discordapp.com/attachments/450256836705386497/502883880039350283/unknown.png

https://cdn.discordapp.com/attachments/450256836705386497/502883510512517173/unknown.png

Huge single purchases of over 5BTC.

And, now they are all gone from the trading history (BTC/ETH):

https://cdn.discordapp.com/attachments/456374588058894336/504980136152662021/unknown.png