should compute in terms of percent...Cause when anything is more expensive...(ie. euro at 1.36...not the same when at .800)
the percent st Deviation will solve that for U.
I just that for U
The daily...stdev(=68% of variation)
EURUSD 0.455%
USDJPY 0.391%
GBPUSD 0.315%
USDCHF 0.435%...