one of my site that was ranking on 1st page got hitted on december. It was in #6 th position but, in that update i lost my ranking now SERP is not fix. You can see the image. but, second keyword is still in #8 position i have already did high pr blog comments with different anchore text ,put 1 new content and did facebook, twitter shearing but, didn't worked. should i do 301 redirect to my new domain ??