Well, that was interesting. And unexpected.
1. Segwit fork cancelled
That crazy segwit fork that no one really wanted anymore? Got cancelled just now. All the people that accumulated bitcoin in anticipation of the fork (like, getting out of alt-coins), well, no fork = no need to hold BTC for the fork.
2. BTC reached new ATH
Right at about the same time segwit got cancelled, BTC reached a new all time high. This A.T.H. was just about exactly what was expected: 1 september A.T.H. of $4930 times 1.61 (fibonaci) = $7935. Just like that 1 september A.T.H. was the June 11 A.T.H. of $3000 times 1.61.
My guess is that large bitcoin holders just decided to quickly push the BTC price onwards to this A.T.H. just to get a lot of uncertainty out of the market. It shot up from $7474 to $7888 in 30 minutes time and withdrew almost immediately.
All the people that held bitcoin in anticipation of this fibonaci all time high, well, fibonaci A.T.H. reached = BTC going down for the correction, just like it did in the previous cycles.
At this very moment, it's likely that a quite some BTC holders are still unaware of the all time high and the cancellation of the segwit fork, or not able to act on it yet (being at work, sleeping, driving etc). I therefore expect a further sharp decline in the coming hours
3. Alt-coins bottomed out
With a lot of people swapping alt-coins for BTC in anticipation of the 25 oct Bitcoin Gold fork and the (now) cancelled Segwit-fork, many alts have bottomed out. There's a lot of fuel for a new upswing all over the place. Most alts shot up after the fork cancellation and bitcoin A.T.H. and will imho continue to do so in the coming days.
So I'm expecting a BTC correction following a somewhat similar pattern like after the A.T.H.'s of 1 september ($4930) and 11 june ($3000). However, since it this current cycle has been a bit overextended thanks to the segwit fork timing, the bearish period could be shorter than usual.
If the previous 2-month cycles repeat, it's possible that a new A.T.H. of about >10K could be reached somewhere among Xmas en New Year. Fibonaci puts it at about 7935*1.61 = 12.7K but I would not bet on these cycles staying 100% predictable forever.
/edit - Disgusting. Xmas has apparently become so commercial it even has its own stock symbol :)