USDX - this is US Dollar index
Code:
//study(title="EURUSD/USDX Ratio", shorttitle="Ratio", overlay=false)
//sym(s) => security(s, period, close)
//EURUSDX = (sym("EURUSD") / sym("USDX"))
//len = input(20, minval=1, title="Length")
//out = ema(EURUSD, len)
//plot(out, title="EMA", color=green)
//plot(40, color=red)
//plot(30, color=#EBC87A)
//plot(5, color=blue)
//plot(3.20, color=red)
//plot(EURUSDX, color=navy, linewidth=1)
and finally, please add alert when these 2 lines crossing.