Recommended pairs for Pivot breakout strategy

Hi guys,

I’m new here and to the whole forex scene so I would like to apologize in advance if the technical terms I use in the post are incorrect. That being said, I will try to explain my situation.

I have been back-testing a pivot breakout strategy which buys/sells when S3/R3 is broken. I have back-tested over different time periods. After a month of testing, I’ve noticed that some currency pairs perform really well with this strategy, eg EUR/USD. . But pairs such as EUR/NZD performs very poorly. ( Consecutive losses until investment gets wiped out )

I would like to know what’s the reason behind such behaviors. What factors should one take into consideration when using this strategy.

Back-testing Results:

Pair: EUR/USD
From: 2014-1-1
To:2014-11-27
Duration: 11 months

Pair: EUR/NZD
From: 2014-1-1
To:2014-11-27
Duration: 11 months

Thanks in Advance.