In addition to the manipulation of the ETH/EUR market on June 19th 2018 there has been another market manipulation by Kraken. Please check the Dash/BTC market on May 24 2018 between 00:00-02:00 (CET). You will see a peak which goes up to roughly 0.0486 BTC/Dash. Please note that this is just another false peak presented by Kraken.
Again the warning to all people still using this platform. Stay away from these manipulative frauds.