Ah, you can't *quite* do that yet.
I eventually want to add to the Overall Score formula access to variables that you would see for a particular player on the Stats page, such as "Rebuys Count", "Average Hits", "Times Placed", etc, etc, etc. But I wanted to get this feature out so those additional items have not yet been added.
At the moment, the idea is that you'll create a Score for a player for each tournament. Creating a Score is almost exactly like "Points for Playing" - you've got access to basically everything about that player for that tournament, as well as tournament data. The Overall Score is some manipulation of those Scores, but you can't pull in other data just yet in computing the Overall Score.
You COULD compute the Score in terms of whether or not the player won and/or whether or not the player finished in the money. Then use the Overall Score to sum up (or some other calculation of) the player's Scores for each tournament.
So, for example, let's say you wanted a player's Overall Score to be the "(number of money finishes + (number of wins * 3)) * (number of tournaments played / total tournaments)". I have no idea if this is a good formula to use, I'm just making it up...
To do this, set the Score formula to:
m + if(rank == 1, 3, 0)
Then set the Overall Score formula to:
sum(scores) * (count(scores) / n)
or
sum(scores) * (s / n)
... after the next beta is released (since s will be automatically set to the number of scores a player has)
If the Overall Score formula had access to a player's statistics, you could just write one Overall Score formula that did the same thing, like this:
(timesPlaced + (first * 3)) * (s / n)
I hope that makes sense. This is a fairly complicated feature...