I set up MT4 on one computer screen on my PC, Laptop. As mentioned before my favourite time frames are 1h but I like others eg 30m and 15m too.
My favourite currencies are minor vs minor or major vs minor because these have good trends often. Majors are USD, GBP, EUR, JPY. Minors are everything else. Eg AUDNZD is a favourite as are USDCAD, GBPCHF. See these links: