Sorry for the newbe question.
Most advice for beginners often recommend picking a pair and sticking to it. But from a purely technical point-of-view why should this matter? Does each market have its own "character" that needs to be learnt?
For example, does it make sense to trade both GBP/USD and EUD/USD at the same time (in the evening Melbourne time, say). I understand these two pairs are correlated, but not exactly. Seems like you could "technically" trade on both of them and gain (or lose) differently. Even on the 5m chart i have plenty of time to ponder more than one pair.