You look fabulous here :) I love where your leg is, your seat is exact dead center over the saddle which is where it should be. Your seat is low to your tack, and you have clearly allowed your horse to lift you out of your tack, instead of you thrusting yourself forward and out, which is wonderful.
Your hip angle is perfect. You are not to close the angle for your horse, your horse is to close the angle for you. You aren't going over big fences and your horse doesn't have a huge apex of a jump - so your hip angle is exactly where it should be.
Here, things kinda fell apart. I can see your head in the upward position...but your eyes are looking down..lol
You know that fence is there. Your horse knows that fence is there - so why are you focusing on it? Ride your horse, not the fence.
So what happened, is that you anticipated the fence, you stopped riding all together *you leg go of your lower leg* you pinched your knees, and everything went to put from there. Your lower leg flung back, and your upper body flung forward.
So - when you are approaching the fence, remember to focus on your horse - what is under you, the most important factor to the situation. Get your leg to the girth, open your knees and get your inner calf at your horses side *remember, we are around our horse, not ontop* and focus on where you are in the saddle. Allow your heels to do their job, which is anchor you in your tack.
Work on focusing on your horses rhythm, focus on riding a strait line to the base of the fence, and sit and wait. Where's your leg, where's your heel, where's your seat, where's your upper body - sit and wait and allow your horse to do his job.
Other than that, you look great :) Your hip angle is just as it should be, but try to push your toosh back.
As Dorothy Crowell says in her clinics I've ridden under her *4 star rolex eventer and representative in the olympics* Push your Ta'Ta's OUT and push your Toosh Back.
So in this picture, I'd like to see your knees opened, calf at horses girth, heels deep and seat pushed back.