Wow. It's the first time I see a professional chart that triggers such a strong optical illusion: https://cdn-images-1.medium.com/max/1600/1*r_I_go-Ei2NmUndXxD

Wow. It's the first time I see a professional chart that triggers such a strong optical illusion: https://cdn-images-1.medium.com/max/1600/1*r_I_go-Ei2NmUndXxD3Ybg.png https://cdn-images-1.medium.com/max/1600/1*r_I_go-Ei2NmUndXx... Is the zero axis horizontal?