Though I do not know thoroughly about the scalping but mainly i do scalping,i just open the 15 mins and 4 hours charts while trading ..but yes me not always infront of them ..if i don't trade ,i used to check the 15 mins chart after 1-2 hours and then go for trade open ,when i am getting the signals from indicators and charts ...i feel no need to always be with the charts. This is how one should trade here.