Before the fork the market just might remain bullish. Maybe up to a 8000 USD pricepoint. Once the fork arrives, a lot of FUD may enter the market. This might turn the overall sentiment way more bearish and this is possibly done in a very agressive way. People (including professionals in all kinds of markets, also besides the financial markets) might be easy to scare, as not many people understand the technology. The price could be pushed down further by whales that look for ever cheaper coins. Many new players that have entered the market on all the recent news could be scared out of their coins, and i'm afraid in unprecedented ways. From 8000 USD back to maybe 4200 USD. After the dust settles whales have their half-price-bitcoin positions ready for many days and prices go up again, i think to at least 15k, once everybody realises it was - at least partially - a setup.