Techniques are described to improve search results using a panel. A search engine deploys one or more network traffic monitors. Traffic monitors analyze network traffic and find HTTP requests made to search engines. When a search query is spotted, the traffic monitor records the sequence of user requests, including search engine, search terms, and sites visited. A sequence of queries where a user visits one search engine, enters a query, visits zero or more sites from the results listings, and visits a second search engine, enters a query and visits one or more websites and stops searching is used to determine whether to increase or decrease a relevance value between a search term and the sites visited.