I think you mis-read my answer, I would use page views on the "create account page" rather than clicks to enter the flow...
Scenario 1 (relying on the click)
- Home Page
- Click to Create Account (start)
- Create Account Page
- Successful Creation (end)
Scenario 2 (relying on the click)
- (Marketing e-mail, linking user to Create Account Page)
- Create Account Page
- Successful Creation (end)
Scenario 3 (relying on the click)
- Home Page
- Click to Create Account (start)
- Create Account Page
- Exit without Registration
Scenario 4 (relying on the click)
- (Marketing e-mail, linking user to Create Account Page)
- Create Account Page
- Exit without Registration
^ In this flow, there will be 2 start and 2 ends... so the success rate would be 100% (end / start), despite 50% of the flows not converting (so the success looks way higher, and in this simple example tells you every flow resulted in success which is not correct)
If the "Page View" of the Create Account Page is used, the Success Rate would now become 50% (4 starts [i.e. PV of the Page] and 2 ends).
Now if you don't want to rely on the actual "Page View" metric, then a custom event could be set up to fire on the Create Account Page (eventX, that only triggers on this specific page)... but honestly, a segment for "Hit: Page equals Create Account Page" and using Page Views will match the custom event that is triggered on the page....
