⭐ Merited by The Pharmacist (2)
What is the best exchange?
There are many exchanges in the world but the best/top exchanges recommended to use are: 1. Binance (number 1 bitcoin exchange)
2. BitMex
3. Bittrex
4. KuCoin
5. Kraken
6. Coinbase
7. Poloniex
You can see the detail information here: https://coinsutra.com/best-bitcoin-exchanges/
Actually, you are no need to ask, you can googling and find it out yourself, buddy.
-snip- how do I make a buy order there?
If you have already verified your account in exchange and you have deposited some money (USD), then you can place "a buy order" there.