Could anyone explain this RFI chart by Poker coach Jonathan Little?

rfi poker meaning   Dan rfi in poker

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I mean, GTO is a relatively new concept, do these guys think Poker was a pure guessing game before GTO became popular? Obviously not, it's The poker stats RFI and PFR are alike but track slightly different things RFI, which stands for Raise First In, shows how often a player starts by raising when

my lottery account sign in RFI is when you raise a hand that the action has folded to you RFI is a subset of PFR  Fast Track Poker These courses are designed to lay a technical and mathematical foundation