All previous rounds ended in ties, and the opponent’s moves appear to be cycling in the same order as my previous moves: rock, paper, scissors, rock. Taking this into account, it seems likely that the opponent might choose the move that follows the current pattern. Since my last move was rock and if they are mimicking my earlier sequence, it's possible that round 5 might be paper or the next logical move in a cycle. To counter a potential paper, I choose scissors in the cycle. However, given the symmetry of plays so far without any wins, I decide to attempt breaking the cycle by going with scissors.