Site jumps between 6th and 18th site of google every hour

hey guys , haha I'm without any explanation . my site jumps between the 18th and the 6 th site of google every hour. one hour ago I edited the keyword density and the number of outgoing links... so i hope that will make it easy for google to decide that it should be on the 6th site.
further more, i will add some article/web 2.0 link wheels in the next days and social bookmark them with 100% unique content. my keyword has got 6.600 searches / month and is in the male enchacement niche...
tell me about your changes in ranking over the night
thanks

They are probably checking the bounce rate of your visitors.

You're probably querying different google servers each time. Give them a chance to update.

D.

Google Algorithm changes more often and it affects many online businesses. Anyway, according to Matt Cutts, we will just focus on sharing quality content in our site and don't do too much SEO or don't SEO your site at all.

I think google has gone loco after penguin