My few reasons for doing so:
1. Market has been in this 250 pip range for quite a long time and this can be observed on a too.
2. We just had a rejection of higher prices meaning our is still valid.
3. Price created a pattern previously in this area.
Always do your own analysis before placing any trades and make sure of using proper risk management.
I always set my TP slightly higher then the actual zone to ensure profits in case of sudden pullbacks all the way to the starting point.