Major Wall Street trading desks are preparing for a volatile trading session as futures markets are set to open tonight. Traders have been called back to their desks before 5 PM, with expectations of intense selling and a potential limit down of 7% as markets reopen. Margins have been raised to full capacity, indicating heightened caution among traders. Reports suggest that this could be a record night with up to 2 million lots traded. The atmosphere is characterized by bearish sentiment, although some traders are also discussing opportunities in oversold stocks.