Arrows (or bullets) always hit high when fired from angle, whether it's up or downhill. It has to do with distance from you to the target being greater than the actual distance as measured from the base of the tree (or mountain, etc.) to the target in a straight line (think of a triangle; the length of the side created by you to target is longer than the length of the base of the triangle created by tree to target). I'm too dumb to properly explain the physics, but if you used sights, you would need to use your 15 yard pin on a 20 yard shot, or something like that. However, Terry is right, you need to bend at the waist, as that it making the problem even worse. Paul.