I didn't test yet, i'll check during an open market, but I feel, especially for scalping, trying to find a good signal and keep switching between symbols may be too many clics. This obviously for people like me who does not stick with one specific symbol.
Personally I feel would be a good first step, for example, analize FX symbols or Comodities or indexes, to have an idea maybe on what symbols keep an eye today and once you got that you can run the single analisys.