A month ago my website was at #15 position. I build backlinks month ago and from this time on most important keywords is very frustrating google dance. One day #60, then N/A, then #15, few days N/A... The website is ~6 months old. The weird thing is that not every keyword is dancing - a few which I am monitoring are on a stable position between 8-10. The ones which have google dance have the most search volume per month and on them, I am focusing. What to do to stable this position? Is it a weird google penalty? Should I create new backlinks or wait another weeks?