Kraken is one of the biggest cryptocurrency exchanges out there. For months now it had stability issues which forced the site to dance on and offline for many hours per day. Their service blacked out for 2 days and it became available again in Jan 13, 2018 – 11:30 UTC.
“Systems are back online. The new trading engine is live. Withdrawals are temporarily suspended while we monitor for anomalies. Unleveraged trading is free for the remainder of the month. More details will be posted to the blog momentarily.”
Kraken Status Incidents.