Type the email address registered to your account and your password, then tick Verify you are human and press Sign In. Both fields are required — the form will not submit until they are filled.
Tick Remember me if you want the email address pre-filled next time you visit from this browser. The checkbox is optional and does not keep you signed in — it only remembers the email for convenience.
The first time you sign in you may be asked to accept the User Agreement, or to set a new password if one was issued to you. Complete whichever step appears, and you will be taken to the Market View.
If you cannot remember your password, click Forgot password? below the Sign In button. Enter your email address and a 6-digit one-time access code will be sent to you. Use that code to set a new password and sign back in.
When you are finished, close the session from the menu so your account cannot be accessed from this computer. Closing the browser tab alone may leave the session active on shared machines.