For successful scalping, it is necessary:

Understanding market mechanisms:

The trader must have a good understanding of price movements, be able to analyze charts, and forecast short-term changes.

Quick reaction:

The ability to make decisions and open/close trades in a matter of seconds.

Discipline:

Adherence to strategy rules and the ability to control emotions.

Low commissions:

Low commission fees from the exchange and broker, as well as a low spread (the difference between the buying and selling price).

High liquidity:

Trading instruments that have high liquidity, meaning they can be quickly bought or sold.