SPR (Stack-to-Pot Ratio)

Stack-to-Pot Ratio (SPR) = effective stack / pot size. It's measured immediately after preflop action is complete. Low SPR (0-3) means players are committed with top pair+. Medium SPR (3-6) requires careful consideration of hand strength relative to bet sizes. High SPR (6+) means deep stack play where implied odds and reverse implied odds matter greatly. SPR heavily influences correct GTO strategy.