4-Bet

A 4-bet is the fourth aggressive action in a preflop sequence (blind → raise → 3-bet → 4-bet). It represents a very strong range in most contexts but can also be used as an advanced bluff (light 4-bet). 4-betting effectively requires understanding opponent 3-bet ranges, stack depth implications, and position. The size of a 4-bet is usually smaller relative to the 3-bet than the 3-bet was to the original raise.