Wow. Thing people might be making this more difficult than it is.
Proxy - use another currency to hedge if cheaper, more liquid etc. Highly correlated with home currency.
Cross - trading one exposure for another. Could just be because you think one will appreciate more relative to home currency.
Proxy - use another currency to hedge if cheaper, more liquid etc. Highly correlated with home currency.
Cross - trading one exposure for another. Could just be because you think one will appreciate more relative to home currency.