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Two things: • You should never have a situation where the same user gets different experiment exposures during the test (unless an anonymous user clears cookies, in which case you would treat it as a separate user since you have no way to tell that it’s the same user anyway). If a user gets the experiment version on day 1, the same user should still get the same experience on day 7 of the test. • It sounds to me that what you want is to use “None” as the option for metric window. In that case you get what you seem to be looking for, that conversion counts regardless of when during the test the user was exposed to the experiment.

@cool-balloon-15377 thanks for your feedback. • I was talking about scenario where the same user gets the same experiment exposure more than one time. • I'd like to see the start of the window being attached to latest experiment exposure time.

I think a better approach would be to have it cover all exposures rather than the very first one only. There are experiments e.g. in my account page, where users might not visit that often, then each exposure should be indicator that user has been potentially affected by the changes, so the the conversion action is relevant.

this is much more complicated to implement in the SQL and makes queries much slower and more costly. I'd consider using no experiment window as the other user suggested.