Can anyone explain me how the transfer exam in caltech works please??

<p>Well I am considering to transfer to Caltech next year...(didn't apply this year due to missed the deadline) and I read their site about an entrance examination need to take for transfer admission, which is pretty unusual. so I have the following question:
1. Where can I take the exam? If I am in Latin America can I take it without travel?
2. How important is that grade? It sounds like it have more importance than SATs for freshman admission...</p>