U.S. equity-index futures and European stocks slipped on Thursday following a report that China doubts the possibility of a long-term trade deal with President Donald Trump.SPY-0.20. Expect SPY will go down to 303.10-302.90, high 304.50-304.80. Trades: 1 Buy SPY 303.50 call 11/01 after open go down to 303.10>first, take profit @ 204.10, risk to go...