If your friend is still playing the market he needs to put in sell orders now to get them in the queue.
The futures exchange in the USA is asking for 26% increase in money deposited to maintain ALL futures contracts on Monday morning.
This was only announced after close of the exchange in the USA on Friday.
Cash is being taken out of the system, so will not be available for the speculators to borrow and meet the margin calls.
It's too late...:¬)