I absolutely agree more pairs = more opportunity.
What I'm saying is the higher the number of pairs you are trading the less concentrated your trading becomes, unless there is some very good reason, way better than a small daily swing, something like a great opportunity ahead. @johnnycash
What I'm talking about is more of long-term trading, far longer than 1-day time-frame. If you trade way too many pairs in a very short intra-day time frame wouldn't the chances be far higher you would get hit at a SL on a pair or your NAV will go down because there will be too many unpredictable swings. So tell me, why would it be nonsense to stay under 15 pairs for long term traders?