I am trying to understand the pairing mechanism in the Cooper pair in real space. When I googled the image of the Cooper pair, there are two different pictures explaining the pairing. While one describe the second electron moving in the same direction, other describe it as moving along the same direction. Which one is correct? Does this answer depends on the pairing symmetry? s, p, d-wave? Moreover, if the answer is that two electrons are moving in opposite direction, how can there be a net current? Thank you in advance.