If your only looking at one graph you'd still be best advised to have two screens. One for the chart and the other so you can have your finger on the button for the platform without having to switch and type to save confusion, even the best traders can make mistakes by being distracted. I would also advise 2 towers(pc's) as these things can break down from time to time and always at an inconvenient time.
Having the correct setup is absolutely crucial from day one. So often I hear people say that I'll see how it goes and if I make money then I'll buy the correct stuff I need.
This would be similar to having cancer and saying, 'I'll try the cheapest doctor I can find and if the treatment starts to work then I'll pay for a top notch surgeon'.
Having the right setup prior to trading will allow you to have the best possible start. I can now hear people shouting at the screen saying 'but if I buy the equipment I need I wont have enough to trade with', if your one of these people then your not ready to start yet.
Get the knowledge, get the setup. Dont go half hearted on either of these.