I think the price of bitcoin after the fork will drop a little bit less than the price of segwit2X futures.

   Example : If price of BTC before fork is 7500$ dans B2X futures is 1500$, I think the BTC price will be a little bit ABOVE 6000$ after the fork.

 The reason : people frightened by the fork are waiting to come in with fresh money, just after this date. (I met this kind of person at work today).