One could have a list of pairs to trade.
Now sitting by the window one could look out into the street.
Well it's obvious isn't it ? The next vehicle is a red car......
well that's a short boyo.
etc.
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Well I must say the title of this thread certainly grabs the attention!
In response to the opening post, I think one of the main issues with a novice trader is not necessarily that they are trading in the "wrong direction" so to speak, and you'll find a lot of people who've never traded before will very quickly pick up a knack for pattern-recognition and identifying a trend very easily. Generally speaking, for many, this would be considered the easy part. So going short just because your girlfriend happens to be going long may actually result in a blown account even quicker than her!
The likely cause of a blown account would be the exact same reason most new traders blow the account - Poor risk management, and a lack of real understanding when it comes to leverage and margin and accounting for the spread between the bid and ask prices. If your girlfriend can master these elements of trading, she may well end up being a profitable Forex trader