Forex can't be easily manipulated since its value depends the economy of the country so technically, there are no whales there that tries to manipulate its value. I can see that Stocks and cryptocurrency are more prone to manipulation, if you own big amount of money you can really influence the price and that's the job of whales aside from making money out of it. Manipulation will stay, so its better to learn how to ride with the trend and follow where the money is going, don't try to beat them because you can't.