My notice on this contest is that to make it more transparent.. Admin should tell us the closing price when declaring the winner and most importantly the broker platform use.
All winners selected so far were very close to the closing price. Even if there was a discrepancy with the closing price among brokers, the small difference wouldn't have mattered.
If you want to know the weekly close for EURUSD, open up just about any platform after the market is closed and you will have a good idea.
If there ever is a close decision to be made, the official closing price will be posted too. So far, the winners have been obvious.
Here is what is stated in the terms:
Due to closing price discrepancies, the Forex Zone administration will select an official closing price from a reputable source such as Oanda. The closing price which is selected by Admin will be used for the purpose of selecting a winner in this contest.