Connecting to the market data for GDAX/Coinbase does not require the user to have a GDAX/Coinbase account.
In order to trade on GDAX through Medved Trader, you need to:
•Have a GDAX account. If you don't have one, create it on the GDAX web site.
•Create an API key for Medved Trader to use. To do that, log into your GDAX account on the GDAX web page, then click on the Menu icon at top right, and click on the API item in the sub-menu that pops up. Or just go to https://www.gdax.com/settings/api
•Create a new API key - in order to have full functionality in Medved Trader, you have to select the View, Trade, and Manage permissions. Choose a passphrase - any passphrase will do - then hit the Create API Key button.
•After you hit the Create API Key button, you may be asked for the 2F Verification. Once that's done, a new key will be generated and shown to you at the bottom of the web page:
•Record the API Key, API Secret and the Passphrase that you used to generate the key. When you set up your GDAX trading account in Medved Trader, enter that information: