Scalping is a strategy of taking advantage of small market movements, quickly entering and exiting positions during a day, or maybe even an hour. The key is making as many successful small trades as possible while avoiding losses - you don’t need high returns per trade, you should be rather aiming to maintain a higher win/loss ratio. Usually, the size of winning and losing trades is nearly the same, a very small percentage of the whole portfolio, thus you have to win more often to be in profit. Some strategies allow to lose the majority of trades, but still make money by winning only a couple of big trades. Scalping is totally opposite.