The point of the frog should be in the center of the foot. To get an idea of how far off it is, if you get gridded overhead sheets, trace the hoof with the hoof on the ground, pick it up and then X where the point of the frog is, there should be the same amount of squares all the way around the X (This is called a Birdsal grid). The hind hooves should be slightly elongated in the toe - heel direction.
It looks to me like the angle is too steep and the toe is too short, but the heels are also quite under-run. I would try to get out a farrier that will measure angles and try to math the toe and heel angels, as well as the angles of each foot to one another and measure with a Birdsal grid to try to get the feet balanced. Now this won't be a $20 trim, but I think it's worth it to get out a good farrier that will really balance the hooves properly in order to ensure soundness and the comfort of the horse. Find a reputable farrier and ask him what he thinks, I am not a farrier so that is just my opinion, but for a really excellent analysis a knowledgeable farrier is your best resource.