The fishtail braid is different from a lot of the regular braids such as an original braid, a french braid, or an upside down braid. All of these braids involve dividing into three columns of hair, whereas the fishtail only involves two.
Pull all of your hair to one side (this also counts for middle) of your head, divide hair into two parts.
Take one strand of hair, it must be the farthest away from the other column of hair.
Cross it over so that it is now combined with the other hair in the other column.
Do the same with the other column and continue on. (Sorry about the picture, it's too bright!!!)
Continue the pattern until it looks like the picture above.Almost done!
When you like the length of your braid, simply put in a rubber band. I added this bow because of my love of chevron, but you don't have to!