The process is straightforward. First of all, you must be logged into your account.
On your Control Panel there is a tab lebelled "Predictions League." You can either click on that, or click on the Prediction Leagues table on the main page (pictured).
Once you've done so, you'll arrive at the Predictions League. There are two categories: the Archived Rounds, which you can browse through to see how betting members did in any given week, and the round(s) for this week, located under "Choose a Round to Enter." Click under the latter, and you'll come to a new screen.
. Here, you're invited to place bets on whichever ten games the moderators have chosen as likely top sellers for the week, as well as for all five hardware platforms. Place the number of units you believe will be sold for whatever region is listed (some games are Japan-only, for instance, or just the Americas, etc.) for that week. Next to your bet is the place where you place how much VG$ you want to bet on that number. For example, I could be quite confident that Game X will sell Y amount, so I bet VG$1000 that it will do so. In contrast, I'm less certain about all the other slots, so I only bet the minimum on all of those (VG$5). This is permitted. Once you're done placing your bets, click on "Submit Your Bets", located at the bottom of the page. You've now entered, and will learn the results in two or three weeks, which is when your payment will arrive. Nordlead suggests keeping this in mind when placing your bets: bet too much on one week and you'll be unable to participate in the next round. New rounds are usually hosted every week, and an overall leader board can be found at http://vgchartz.com/forum/thread.php?id=26498&start=0.