Hi, I am looking for some help. I recently opened an Interactive Brokers account and trade some stocks and futures. My question is that I have noticed since last wk that around 2 pm my margin changes on oil futures. I have spoken with their staff on two different occassions trying to get an explanation but have received conflicting answers. I was told it was because of volitility and second that cl closes earlier than the other futures. The higher margin adjustment had not occurred in the prior two months during regular trading hours until 4pm along with es and nq. I would appreciate any imput. thanks, M