A refinery in Martinez, California. Photographer: David Paul Morris/Bloomberg The oil market on Friday looked like did it for much of the week: choppy. Prices have been in a tug-of-war pattern for several days as traders take in conflicting signals on supply and weigh them against the outlook for the US economy. Repeated Ukrainian strikes on Russian energy assets along with global calls to place levies against Moscow’s crude have underpinned support. But so far, most experts still expect the market to mo ...