Hello,
sometimes I see coins on coinmarketcap which shows extreme gains,
but when I look at the exchanges, the price is much lower.
For example 6 $ on Coinmarketcap and 2 $ on an exchange.
How is that possible? Is this a bug or manipulation?
Not a manipulation thing which had been mentioned earlier that price do shows on average total on all exchangers on where a coin is being traded on. Sometimes pumps do affect this one where coinmarketcap doesnt able to update recently when you checked it out which you can presume or do tell why the price is like that but sure thing that it isnt a manipulation thing. Price would vary on each exchange.