Has your site been hurt by one of the latest Google updates ? Are you looking into using the disavow tool to try and get your rankings back ? I'm finishing working on a software that tries to detect possible toxic links in a backlink profile. I need to run it over a few sites that have been hit recently in order to try and improve the toxic detection. PM me your site details and when you lost your ranking. I will send you back a report with all the backlinks found sorted by Toxicity. In exchange I only ask you to let me know how good or valuable was the report for you.