Forex trading is done by the use of fiat currencies such as USD, EUR, YEN, INR etc... All these currencies represent a countrie's legal tender.
And exchanging one for the other in order to gain profit from their price differences is called forex trading. Whereas trading of virtual currencies such as Bitcoin, Ethereum, Ripple etc... which are all crytpo currencies is called crytpo trading. I hope you get to know the difference between them.
Kindly use the very popular search engine "Google" the next time before making a post.
Forex trade is actually the exchange of one country's currency at a certain rate with that of another country and these days, forex trade is no longer tied to trading with fiat, most brokers now also accept some cryptos as base currency, since cryptos are also currencies - digital.
One won't be out of place to say crypto trade is also a form of forex trade, because they both share a lot in common. Crypto trading, however is not structured around margin/leverage trading as is prevalent with forex trading. In terms of stability, forex trade is relatively stable because they are well capitalized and more liquid than cryptos and which makes pumping and dumping a phenomenon with cryptos, nevertheless both are manipulable one way or the other.