Time travel is possible. History can be changed. Why would historic prices for March 2020 change in Apr 2020? My original link https://www.barchart.com/futures/quotes/UXH20/price-history/historical as of March Current Barchart as of April https://www.barchart.com/futures/quotes/UXJ20/price-history/historical as of April Can you see the differences? Holy smokescreen Batman! What the heck is going on here. Can history be changed? It appears to be the case.