This is an application of the WaveTrend indicator by LazyBear against a basket of the eur and usd to come up with a total eur and usd wt value. You can change the currencies by altering which pairs its run on. As far as changes I removed the lagging 4sma and altered the OB OS to be 2 and 3 standard deviations from a 1000sma just to get a stable view as to where the values tend to rise to. I've had some success using it over the past week or so, when dollar is OB an euro is OS you can expect EURUSD to go up as those reverse and vice versa.