Quoted from KRAKEN notification email:
In order to help mitigate the strain on our platform caused by recent exponential growth, we are delisting some of our illiquid trading pairs and temporarily suspending all advanced order types. These changes will go into effect on Tuesday, August 22 around 6 am UTC (Monday August 21 around 11 pm Pacific).
The following pairs will be delisted with all outstanding orders being canceled
XBT/GBP
ETH/GBP
XRP/CAD
XRP/JPY
EOS/EUR
EOS/USD
XLM/EUR
XLM/USD
GNO/EUR
GNO/USD
REP/USD
The ability to create new advanced orders will also be temporarily suspended (so you will only be able to create basic limit and market orders)
Open orders will remain open until cancelled or executed, but you will no longer be able to create new orders in any of the following advanced types:
Stop Loss
Take Profit
Stop Loss, Take Profit
Stop Loss, Take Profit Limit
Stop Loss Limit
Take Profit Limit
Trailing Stop
Trailing Stop Limit
Stop, Limit
This suspension is temporary only. Advanced orders will return in a month or two as soon as we are better able to process them. We know that many of our clients like the advanced orders, but they are used much less frequently than basic limit and market orders while taking more system resources to process.
The above changes will go into effect on Tuesday, August 22 around 6 am UTC (Monday August 21 around 11 pm Pacific).
We apologize for the inconvenience but we think that immediate action is needed to help alleviate the current strain on our platform. We may take further action if these changes aren’t enough. Our overall plan is to reduce the load on our current platform until upgrades can be made that will enable us to smoothly scale capacity.
Thank you for choosing Kraken,
The Kraken Team