BTC holders received 1 BCH for each BTC during the fork in August. How will be the case in November? Will BTC holders and BCH holders receive 0.5 new coin for each BTC and BCH?
The potential fork in November does not affect the BCH-chain at all. Since the new coin does not have a name yet, I will just call it BFC for now.
If you have 1 BTC now you will have 1 BTC and 1 BFC in November.
If you have 1 BCH now you will have 1 BCH and 0 BFC in November.
If you have 1 BTC and 1 BCH now you will have 1 BTC, 1 BCH and 1 BFC in November.
Nobody knows if the new BFC coin will stay like BCH or if nobody supports it (= nobody mines it, it's worth nothing, not listed in any exchanges, ...).