Yes. Google sign-in is the only login method right now.

Access is still controlled. Your Google account must be approved before sign-in succeeds.

Yes. Data is scoped per signed-in user for watchlist/portfolio flows.

Use the Alerts page from the top navigation.

Alerts are most useful after you start following relevant entities. A new account should begin with a clean inbox, not a noisy feed.

No. It is a research tool. You should still apply your own judgment, sizing, and risk controls.

Use the Contact page.