How can I view the history for a particular visitor?
When viewing your detailed click, actions or sales stats you can actually click on any IP address to see a detailed “visitor history” for that particular user.
It will show you all of their activity—clicks, actions, sales, etc.—in chronological order, and even show you a few other stats like their “lifetime customer value” or LTV.
Tip: If you want to know about the average lifetime customer value—and other related stats—just hover over the icon in your link stats. The details are coverd in this FAQ:

|  | What are all the different columns in my stats?