Only thing you need as a daytrader, especially if scalping, is a chart. Everything is already priced in. Even the economic numbers you talk about, once they're released, will be reflected in the price. You trade by forecasting, but mainly reacting, to price movement. My advice: learn price action and price patterns. Forget the rest. They're only distractions.
does a scalper not research anything the day before?
or is it 100% reactionary type of trading in the moment basically?
wouldnt it help to check general market sentiment for example or any announcements or splits or corporate actions?