NDAX is a Canadian cryptocurrency exchange platform that allows users to buy, sell, and trade various cryptocurrencies, including Bitcoin, Ethereum, and others. To log in to NDAX, you typically need to visit the NDAX website and enter your registered email address and password on the login page. If you're new to NDAX, you may need to sign up for an account first by providing some basic information and verifying your identity. Once you're logged in, you can access your NDAX account dashboard to manage your cryptocurrency holdings and transactions.