There is a need for defining what is meant by scalping. There is a lot of confusion regarding this. In my opinion scalping is practiced on tick level and/or in 1min and probably even 5min chart. It is essential for scalping having a low spread account. This excludes most of the market making brokers. I think the spread should be smaller than 0.5 pips - the lower the better. Technical indicators are of no use, with an exclusion of a couple of SMAs.
If the trade is not working on traders' direction the trade is going to be closed. One can understand that if most of the wins are around 1 pips there is no use paying high spreads or commissions. Spread overshadows those tiny wins, which are concealed between bid and ask levels.
Scalping is NOT having a huge stop loss level in order to gain a couple of pips. That is gambling.