I would hold for years if I found a trend that lasted that long. Typically they violate my "trend is still good" criteria after weeks or a few months. I have been trading GVAL, EWZ, EWZS, ERUS, SLV, VGPMX, VDE, GSC, and VWOB. I am currently in all these except SLV. I may add EWH, EPOL, and KOL.