Unfortunately, Betterment is not setup yet for foreign investors.  However, we suggest two options for our international friends:
a) Open an account at Fidelity.  We can implement all of the Trinity portfolios at Fidelity. Unlike Betterment, Fidelity does not charge a platform fee of 0.15%, but does charge their standard commission rates on trades.  Please reach out to sm@cambriainvestments.com if you are interested.  Tax harvesting is not yet available at Fidelity.
b) Simply invest in Cambria ETFs that mimic the Trinity allocations through your local brokerage.