From OandaSOURCE: Zero Hedge.
Due to the extreme volatility some market analysts foresee could result in the coming days, OANDA fxTrade will not accept any trading activity from 6:00 AM EST until approximately 3:00 PM EST, on Sunday, June 17, 2012. OANDA believes the convergence of a major market event during off-market hours represents a potential trading risk and has taken this rare step to protect traders from excessive rate fluctuations. Please note that during this halt in trading, you can still access your account details but no trading activity will be accepted. For this reason, OANDA strongly recommends that all traders consider minimizing currency exposures prior to the trading halt.
If you do intend to maintain open positions during this period, be aware that OANDA will hold exchange rates steady during the trading halt. However, when trading resumes, rates will immediately adjust to the current market rate and it is possible that the updated rate could result in a margin closeout if the price has moved significantly against your positions. Therefore, it is your responsibility to ensure you have adequate funds in your account to prevent a margin closeout.
OANDA apologizes for any inconvenience this may cause. For more information, please contact a Customer Service representative.
The OANDA team
OANDA Corporation is a financial services provider of currency conversion, online retail foreign exchange (forex) trading, online foreign currency transfers, and forex information. It is one of the non-bank Futures Commission Merchants (FCMs) specialized in spot forex trading. OANDA is a registered FCM with the Commodity Futures Trading Commission (CFTC) and a member of the National Futures Association (NFA).