Of course Trump owns stock in the company that is building this pipeline, so hopefully he doesn't go the conflict of interest route and try to ramrod this thing through once he gets into office. The Native-American Indians have been backed into the furthest corner that they can possibly be backed into. There is nowhere else for them to go. That is their environment and they deserve to have a safe water supply and deserve to have their sacred lands honored.
If you don't think Obama wasn't applying pressure here so as to build his "legacy", you obviously aren't thinking. It is odd how, just like with Keystone XL, he waited until after an election day to do this. Anyway go celebrate your symbolic victory. You've delayed the inevitable and you may have even caused the pipeline to be rerouted, but I expect that by the time of the next presidential election both DAPL and Keystone XL will have been completed and transporting oil less expensively and more safely than the alternative of moving it by rail.
pro-tip: when you sound like the villain from a bad saturday morning cartoon, it may be time to rethink your position