I have been trying for days to find a Nether Fortress. I've looked up different ways on how to find one and I happened to stumble upon an answer that might help me. The question he asked was just what I was looking for. Someone answered him and said, "There are infinite nether fortresses in the nether. They spawn in rows every 200-400 blocks along the world's North/South axis." I don't even know how to find the North/South axis. I'm on bedrock edition and all I can see are coordinates. And, I'm pretty sure you can't use a compass in the Nether, so what do I do? And how do I find the North/South cords?
You can use the south-east rule, which works in all dimensions. Place 4 pieces of minecart track in a T shape, with the intersection piece last, and it will favor south or east. Do this twice, with the second T rotated 90 degrees from the first one, and you'll be able to uniquely identify which way is which.