I ask myself outside the fact that when people made withdrawal it affects the price going down and when people invest high capitals it increases the price automatically
What do people want to do with deposit to exchanges and withdrawal from exchanges?
Not all of them make deposits to sell their bitcoins. They can do it to consider exchange wallet as their wallet to store their bitcoins. That is a bad idea.
Reminder: do not keep your money in online accountsThey can make withdrawal from exchanges to store their bitcoins more safely in their non custodial wallets. It does not help to increase demand or reduce selling pressure on exchanges. Just your theory.
is there some kind regulators like human agents or electronic technology who always do the regulatory price actions especially when trading bitcoin?
A best thing they can do is using regulations, regulatory news, proposals to make panic on the market to manipulate it. This market is manipulated by news, fuds which have biggest effects if related to regulations.