My "charlie brown orchid" I.D. help?

[Mysbhvn]

Hi Everyone!

I am fairly new to this wonderful hobby. When I first started I went to a local nursery for a repotting class. One of the things included in the cost of the class was that we got an orchid after the class was over. I should have known it was too good to be true! The orchids they brought out for us to choose from were on their way out. I figured they couldn't sell them in the nursery so they were giving them to us....we were all beginners so what were we going to do with dying orchids?? We were lucky to keep our own alive So, I accepted the challenge. I was going to take one and give it my best shot, what could it hurt?? So, the picture below shows my "Charlie Brown" orchid. I believe it is an oncidium?? Is that correct? As far as the name of it I have no clue...there was no tag or anything to identify it. Anyone have a guess?? Thanks for the help!
LuAnn