This is something I am also studying. But it is quite difficult to know and follow the movements of whales in the market. And because it was quite difficult, I changed my perspective and tried to be more active in looking for information. So I can get earlier information. Because most whales they also move based on information. So the steps I took were steps that whales might also take. Although I'm not sure. But so far I have made quite a profit after being more active in searching for information. Maybe people call it fundamental analysis. And I have to admit that information is one of the triggers for market movements.
Whales move with information, when they have information about something new that the maker doesn't know they start taking action therefore if you want to follow whales and be able to do things like they're doing you have to follow the information. You can observe their wallets too, there are some whales wallet that are known to the public and if you keep observation of the wallet you can buy the coins that they're buying and also sell the coins that they're selling. I won't monitor a whales wallets for when they're buying or selling Bitcoin but I can do it for altcoins because I don't know how to buy good altcoin but when investing in Bitcoins, I know when to buy and when to sell to take profits. Following whales have advantages and disadvantages because whales can manipulate those that are following them.