Some info on fees here:

Fee Structures | Explore our trading fees https://www.kraken.com/features/fee-schedule

Having used Kraken Pro several years ago, I was scratching my head on why this post from today read "Launches". After a little digging, there was this recent announcement, which now is on another post found here on SN:

Bear markets are for building: Kraken’s new and improved Pro trading interface #111040 https://blog.kraken.com/post/16513/bear-markets-are-for-building-introducing-krakens-new-and-improved-pro-trading-interface