You can match if you pass Step 1 and graduate from a medical school. It is possible, but to be competitive, looks like Step 1 scores 230 or higher, doing well on all your 3rd year rotations, good letters, AOA helps a lot and research helps if you're interested in big time academic places. Being a graduate from a U.S. medical school is a huge advantage as well. It's a great field, you can always try and who knows what it'll be like in the years to come. May be more competitive or less. The last 2 years and this year has/is very competitive. Derm is still harder though, radiology does have 900 slots a year and derm has maybe 250.