Relationship between bitcointalk.org activity and bitcoin price.
http://www.bitcoinrates.in/homebitcoin/Normalization:
Bitcoin Price(1)
Bitcointalk Posts(1/100)
Bitcointalk Registrations(1/10)
Bitcointalk PageViews(1/10000)
I don't think Price is matters with bitcointalk, Bitcoin price is based upon the market supply and demand. No other things involve in these. Then halving and adoption will play some their part in bitcoin.