Go to http://tiajudy.com/scallopedge.htm for original pattern. I'm trying to figure out an overall increase. In Row 2, the kfb should be a p1 k1 into the yarn over, but there is no way to say that here. Also, in row 1, if you want to repeat the pattern cast on a multiple of 18, ssk, k5, k2tog, yo repeat that until the last 9, ssk, k5, k2tog, then repeat following rows as written.
Shown with a cast-on count of 18 stitches.