This is a set and forget system that gets you in with the direction of the trend with a good R:R.
Time will tell on this one - Personally, I believe the system is too simple to provide long term results - that is not to say complex systems will perform better per se...
I would regard a trade with good R:R as one that can have a tight stop - usually just the other side of resistance (be it ma, daily range, and/or a fib levels) - strong trend as indicated by an oscillator and an ma) with a reasonably 'free passage' (no resistance levels) up to the profit target (which could be next fib for instance)... Normally the potential trade would be confirmed by looking at larger timeframes to make sure the longer term trend is inline with the shorter term one (safer trade) - but it is still possible to profit from short term trends that go against longer term trends... In my view the method NT uses to establish trend is flawed as it is seriously laggy and should really be used as confirmation rather than the sole decider...
But of course this moves away from NT, its 'set and forget' approach and its ease of use... Overall I do not believe NT has good R:R as the stops and limits are fixed irrespective of resistances that appear on the charts when you add a few indicators... Having said that it does appear to have been profitable in the recent past (not many months of results) - but I am sure it could be better with extra criteria that kept us out of entering many of those bad trades...