Line-of-sight velocities presented across a slice along the terminator. Equilibrium temperatures increase from the coldest hot Jupiter case in our sample HD 189733b on the upper left corner to the hottest hot Jupiter example in our sample WASP-121b on the bottom right corner. Positive values denote winds moving away from the observer, and the effect of planetary rotation is not taken into account. For guidance in reading this plot, please refer to Figure 1.