Correlation Currency Pair does not necessarily shows you the direction. If the first currency pair moves first, and the 90% correlation pair that we all assume would be following next. But there is a 50% that the first currency pair will come back to the original place where it just start off within an hour. Well it's true that it makes back the 90% correlation.
However, you are still safe with the 90% correlation
pairs because it does not make such a drastic move.
So where do we use it?
a) To show you confusions?
and same directions? same directions would go off for a long
period of time.
b) To show you the similar
candlestick drawing between 2 currency pairs. This is where you
could learn candlesticks pattern.
Does candlestick have any weakness?
It's a 'yeah'. However, learning candlestick is not a skill of
matching every single candlestick, as it's a general view of
candlestick to be viewed as a group. If you are matching every
single candlestick, when you are in the trade, you are going to
match every single candlestick every minute and use stop loss
to hit.
Therefore, NZD and AUD let's you check the similarity of candlestick as well as let you view what type of candlestick that makes you see the chart clearer even both of them is similar.