There's something strange going on concerning quoted closing prices of orange juice. For example, theice.com and my broker's trading platform show the close of May OJ for today (2/6) to be 73.6 cents/lb, whereas futuresource.com and TNT 5.0 show that price to be 72.75 cents/lb. I also noticed a similar discrepancy concerning yesterday's close. Can anybody explain the difference?