index=test sourcetype=test_access tag=prod server_name!="www.test.com" earliest=-4h latest=now | timechart eval(avg(request_time)*1000) as "Today" | appendcols [search index=test sourcetype=test_access tag=prod server_name!="www.test.com" earliest=-7d-4h latest=-7d | timechart eval(avg(request_time)*1000) as "LW1"] | appendcols [search index=test sourcetype=test_access tag=prod server_name!="www.test.com" earliest=-14d-4h latest=-14d | timechart eval(avg(request_time)*1000) as "LW2"]base-search
It is just a search - try it 😀