RPI Formula
(((2/3*Win Pct + 2/3*Average Vote Pct + 1/2*Opp Win Pct + 1/2*Opp Avg Vote Pct + 1/3*Opp Win Pct^2 + 1/3*Opp Avg Vote Pct^2) / 2 ) -0.5) * 2.
NOTE: The ^2 actually means "Opponents of the Opponent", (not squared) but I didn't want to type that all out.
Some causes of large RPI rises and falls are:
Big win/loss (well, duh)
Previous Opponents wins/losses (particularly if more than one does it in the same update)
RPI score (some gaps are much thinner than others in terms of overall RPI score).
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