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We've made a LOT of improvements to our on page SEO and we've been on the right track, but since about 26/7 our rankings appears to have gone down. Since early 2015 we've reworked a lot of the copy on our site to improve the unique/duplicate ratio, we've redone a lot of urls that didn't make any sense. We've improved image alt-text and file names. We've reduced image size on most of the site and we have disavowed spam links (obvious ones like nike shoes and oakley glasses). We've basically improved on-site SEO as much as we can with headers and whatnot. We've been hacked 4 times since January and we had two partial manual penalties from Google, but they were quickly dealt with and we've switched server to one that is both safer and a lot faster. Most of the hacked content seems to have disappeared from Googles index but not all of it. We have also tried our best to deal with URL parameters and we've made 301's out of hundreds of URLs with duplicate content from old slideshows that basically only had an image. And there's even more things we've done like working a lot more with social media, but despite all that were loosing ranking every week and our SEOlytics SVR is at its lowest since early 2014. And we've never (afaik) bought links or anything like that. Obviously we're doing something wrong but frankly we're running out of ideas. We've lost rankings on individual important phrases but there's site-wide general drop.