Example 1: Right on macro, wrong on the trade
A trader develops a well-reasoned view that a currency should weaken, and shorts it with conviction, adding as it rises against them because the story has to play out. Months later the currency does weaken, vindicating the macro call, but the trader was stopped out, or worse, long before, having fought price the whole way up on the strength of the narrative. The macro view was eventually correct; trading it directly, without letting price and risk rules govern the position, still produced a loss. The story was right and the trade was wrong, which is the central lesson of macro's limits.
