I believe that you should have both in your arsenal swing trading is easier in my opinion what I usually do is scalp while i am waiting on swing trade set up but only a few hours a day just i think it is based on pips per hour in front of the computer not really swing trading i can catch reasonably big moves and i can go do something else i am waiting for a set up i am scalping i am constantly in front of the computer monitoring and adjusting my trades if you have the time to invest in scalping and you were good at it you would most likely see a higher return than with swing trading.