Detection significance trends when stacking transit observations based on the S/N of Wendelstein. Each line represents the number of transits required to reach the 3, 5, and 10σ significance thresholds marked as the grey dashed horizontal lines. These predictions are based on the 2500 K template, which has shallower lines, and therefore these predictions are conservative and could be more robust on a per-transit basis if the equilibrium temperatures of the planets were higher.