singapore dec 17 reuters  malaysian palm oil futures ended four sessions of losses to jump 21 on friday as it tracked rival oil gains on the dalian commodity exchange the benchmark palm oil contract for march delivery on the bursa malaysia derivatives exchange gained 94 ringgit to 4496 ringgit 106819 during early trade the jump was likely due to costlier rival oils on the dalian commodity exchange a kuala lumpurbased trader told reuters dalians mostactive soyoil contract rose 2 while its palm oil contract jumped 35 soyoil prices on the chicago board of trade were up 02 palm oil is affected by price movements in related oils as they compete for a share in the global vegetable oils market the contract is however set to plunge 63 for the week due to weakerthanexpected exports during the first half of december palm oil may gain more into a range of 4555 ringgit to 4625 ringgit per tonne as suggested by its wave pattern reuters technicals analyst said  chicago wheat futures edged higher building on the previous sessions near 2 gains on the back of strong weekly export sales and dry conditions in the us plains while corn and soybeans were stuck in a tight range  oil prices dipped on friday putting the market on track to end the week roughly unchanged as surging cases of the omicron coronavirus variant raised fears new curbs may hit fuel demand while a weaker dollar supported commodity markets broadly