Deviation angle θ (Eq. (23)) as a function of the ratio between the stellar radius and the planetary semi-major axis for Kepler RGB stars with confirmed transiting planets listed in Lillo-Box et al. (2016). Planets around RGB stars analysed in this study are coloured according to their host star. The black dashed line indicates the maximum θ value for planets transiting Sun-like stars computed for close-in planets like hot Jupiters, θ ≃ 5.7°.