Based on data from the gdax trades api, in the approx. 2 minutes and 40 seconds this was live on gdax yesterday, about $15.5 million USD of trades occurred, at a volume weighted average price of $5,080.
is it possible to sign up for GDAX instead of coinbase if you don't have a US based company?
I'd much prefer programmatic access and coinbase hardly ever works at times like these...
I think if you can sign up for a coinbase account, you automatically get gdax access as well - I don't think there's any additional requirements for gdax.