In scalping the trader usually sticked with a pair that is most volatile example BTCUSDT or ETHUSDT with low commission for crypto while in forex trading trading pairs lsuch as EURUSD, GBPUSD and USDJPY are mostly with low spread, however scalping require maximum concentration and focus by the trader because it involves a short movement of the price and precise entry and exit is the most factor to considered by an experience scalpers however this comes with numbers of years and skills, thus it is not advisable for any newbie to start trading as a scalper else such a trader will rekt their portfolio swiftly.
There are different trading strategy one can use to bring profits from trades. Scalping is one of the worst strategy for newbies to adapt to, but it's very essential and good for experience traders who knows the entire formation of scalping. It's one of the tough method to use in trading because it blows forex accounts easily and run down futures trading accounts into liquidation. I wouldn't advise anyone to start scalping without undergoing well equipped PDFs concerning scalping. My favorite pair is EURUSD pair and it's absolutely understandable.