The phrase "unchartered territory" means going into unknown or unfamiliar places or situations, where no one has been before or no one has explored or documented. Full definition
Without question, we are in unchartered territory in terms of central banks participating in the stock market. (netpicksetfinvestor.com)
Market tailspins have chased investors into gold and other safe havens, including Bitcoin, as the global economy moves into unchartered territory in terms of post World - War II global economics. (bitcoinmagazine.com)
I can rock a romper like no other (see yesterday's outfit), but jumpsuits are a bit of unchartered territory for me. (skirttherulesblog.com)