besides having graves, i’m a medical technologist in a hospital lab and run these tests. when i was first diagnosed, docs mostly monitored the TSH results, trying to keep them at 0.4. since TSH reflects the feedback mechanism, and stabilization might be an issue, the current approach is to measure the Free T4, which is the thyroid hormone circulating through your blood. The high end of normal is where you want to be. Too high and you’re still hyperthyroid with the same symptoms. I spent years being borderline hypothyroid because my doc only watched my TSH. I think this is a problem for lots of patients.