Once you arrive to your foreign destination, you’ll find that your dollar goes a lot further than it once did. As an example, when I visited Europe with my then-fiancée in 2007, I recall trading about $1.35 for one Euro and over $2 U.S. Dollars for a British pound.
Since a strong dollar is a bad things for most foreign stocks, this may be counterintuitive, but if your goal is to buy low and sell high, you might see foreign stocks as available at a discount in times with a strong dollar.