This article explores the key points of the horizontal stack formation for ultimate frisbee. It outlines the uses of this tactic, such as using space effectively and simplifying the game. Additionally, the article demonstrates the main components of the horizontal stack, including a disc-side stack, a player-side stack, and a handler-side stack. Furthermore, the horizontal stack is presented as a double-edged sword, as it makes the offense predictable and easier to defend, but can also lead to quick turnovers. Finally, the article concludes by suggesting that incorporating the horizontal stack in certain situations can help teams become more successful.