It is Oncidium alliance. By the name it sounds like it will have yellow blooms. I would keep it on the moist side, only let it dry partially. By the look of your bark mix, you can probably water every day with no problems. And maybe a little more shade than it is getting now, the purple new growth tells you that it's getting a bit too much light. I find that when they show purple foliage, they also show a bit slower growth because of the light intensity. Enjoy!