DislikedJim rogers and Warren Buffet habitually average down, they don't double down but they go an adding to their positions as it goes against them.Ignored
Rogers is brilliant when it comes to global economies and politics, and economies cannot be manipulated as individual stocks can. Also, the trends in economies are very long term and somewhat predictable. The same principles and reasoning cannot be applied to FX position or swing traders.
In their circumstances it can be done, and perhaps it could also be done by some really switched on "carry traders", as long as they have an ultimate uncle point because markets can stay irrational much longer than we can stay solvent.