International ETFs have been under fire this summer as shifting currency woes and economic forecasts continue to indicate signs of trouble.

U.S. corporate earnings growth has slowed. Heck, if you are looking at companies in the Dow Industrials, earnings have actually declined for three of the last four quarters. Yet record highs for broader U.S. stock benchmarks continue stealing the headlines.

One of the best web sites for identifying trends in the ETF marketplace is ETFscreen.com. And one of the best features at the data aggregation portal is the Relative Strength Factor (RSf) reporting.