Those things are not as accurate as they seem since sellers can apparently opt out of allowing their price to show on the api used (or possibly Amazon does it a

Those things are not as accurate as they seem since sellers can apparently opt out of allowing their price to show on the api used (or possibly Amazon does it automatically). It should work for this kind of thing with prices above normal, but I've seen multiple instances (out of not that many times I've looked) where deeper sales are not reflected in the price trackers (and not shown as missing data either).