I always trade within an "umbrella" of macro fundementals, it can be very meaningless in individual stocks, ( I don't trade stocks), and have a lot of meaning to Indexes but to FX the macro econ fundies are everything. The really interesting thing about fx is that they are pairs so there can only be one opposite view, one has to rise and one has to fall. The trap in FX is not being able to properly interpert the fundies. Properly being defined as interperting them the same way as the market does.
For example, the German #'s came in as expected, not lower which would have provided Trichet some breathing room, now he doesn't know if inflation is up or down so they look to next bit of info. The mkt is always hungry for info. Today there is the USD case- shiller index( home prices),new home sales, consumer confidence. These will affect the USD driving the EUR value in the opposing direction. Then tom there is German import prices. EUR current account,German cpi and BOJ Shirakawa. The pair reacting to every announcement. The mkt doesn't move unless there is a reason for it to move, these #'s are the reasons. Another EURO guy on bloomie going about the FX trade, nobody knows what to do,lol
edit: BOJ will signal wether or not the carry trade is still viable.