Maybe it possible to move bitcoin price around 35 to 40% before halving because bitcoin price has been reached from $7k to $9k within short time in January 2020, so bitcoin price has been already pumped more than 20 % till now. and we can check the past halving history the bitcoin price has reached all time high past halving as i mentioned details about past bitcoin halving price of bitcoins.

1) bitcoin halving event in November 2012, after 12 months bitcoin price reached all time high as $1000

2) bitcoin halving event in 2016 after that bitcoin price reached all time high again in December 2017 as $19000