There's no clear indication from the title 'orphan based off a true story' that it's a horror movie. It could be a moving story about an orphan's journey, perhaps showing their struggles in the real world. Maybe it has some sad or difficult moments, but not in the sense of a horror movie which typically involves things like supernatural elements or extreme gore. It could be a story of hope and growth despite difficult circumstances.
Definitely not. 'Orphan' is not rooted in reality. It's a work of fiction that uses elements of suspense and mystery to captivate viewers. The story and characters were invented for the purpose of entertainment rather than being based on actual events.