Find a coin with price difference on two exchanges then buy fro exchange where the price is low and sell on the price where it is selling high,just simple though.
it isn't that simple at all. buying in an arbitrage is easy but you must already have that coin on the other exchange to sell. So it isn't that easy at all.
In my opinion to do decent arbitrage you require a funds of 20 to 25.000$
Put 2000$ on 10 different exchanges. Use 1000$ to purchase 10 different coins each 100$, then purchase 500$ in BTC and remaining 500 you hold in USDT. As soon as you have done that you can start arbitrage in my opinion.
But to become profitable it even is harder. need to take into account the fee you pay on your buy and sell trades, transaction fee if you need to send crypto from 1 to another account.
Basically arbitrage is not holding the coins on different exchange,it is simply buy an coin and move to other exchange and then have to sell so in the waiting time we may lose the value of our coin.