forex for dummies

In forex trading,some of the currencies tend to move in the same direction,and some of them may move in opposite direction. This is a powerful knowledge for those who trade more than one currency pair. It helps to hedge, diversify or double profitable positions.

Statistically measured by performance, currency pairs are given so called "correlation coefficients" from +1 to -1.

Correlation +1 means two currency pairs will move in the same direction 100% of the time. Meanwhile a correlation of -1 means they will move in the opposite direction 100% of the time.A correlation of zero means no relation between currency pairs exists.

Examples of same direction moving currency pairs are:

EUR/USD and GBP/USD
EUR/USD and NZD/USD
USD/CHF and USD/JPY
AUD/USD and GBP/USD
AUD/USD and EUR/USD

Inversely moving pairs are:

EUR/USD and USD/CHF
GBP/USD and USD/JPY
GBP/USD and USD/CHF
AUD/USD and USD/CAD
AUD/USD and USD/JPY

For what this information?

1. A very simple use is avoiding trades that cancel each other. For instance, knowing that EUR/USD and USD/CHF move inversely near-perfectly, there would be no point to go short on both positions as they eventually cancel each other (loss + profit).
2. When confident, a trader may double position size by placing same orders on parallel (moving in the same direction) currency pairs.
3. Another option would be to diversify risks in trade. For instance, AUD/USD and EUR/USD pairs have the correlation coefficient of about +0.70 which means that pairs are moving mostly in the same direction but not as perfect