The forecasted range for same-store sales indicates a stable but uncertain outlook for Potbelly's performance in Q1 2024. The slight potential decrease or increase suggests that the company does not anticipate significant changes in its sales performance. This stability might not strongly influence investor sentiment, leading to a neutral impact on the stock price in the short term. However, the forecast's accuracy and the company's ability to meet or exceed the upper end of this range could positively influence perceptions over time.