1. Tie your get down rope either at the base of the neck or around the upper portion depending upon how much you will be on and off your horse (or what part of the country you are from) and the length of the mecate.
2. Put on the bosalita (3/8ths or pencil 1/4 inch) with the center hanger.
3. Gather the forelock hair and lay the string flat against it.
4. Take one wrap of the string around the forelock.
5. Take a second wrap in the same direction as the first only this time lap it over the first wrap to help secure it. You may opt to choose to tie a half hitch and then cover it with a wrap.
6. Keep the slack out and lay each wrap next to the one before it. Use your thumb to push and pull it up tight.
7. Coming to the end, make a loop and a half hitch to secure the tie. The loop will stay out to one side of the horse's face.
That should hold. There are a couple of ways to do this, but this is the easiest I know of.
Remember, the alamar knot is NOT for everyone or every horse. It is a badge of honor. A horse wearing the legendary alamar is expected to be able to do anything asked.
A standard get down rope, however, is an essential piece of gear for leading that should be used on all horses wearing a CA type bit no matter the type.
NEVER TIE A HORSE WITH A GET DOWN ROPE.