Not yet. Custom scripts, your own and community scripts alike, do not run on CME Group futures such as ES and NQ, and neither do alerts on them. CME licenses its market data under rules that do not cover custom code yet, and OpenMarket is waiting for CME's approval. There is no date yet.
Many of OpenMarket's built-in indicators, including the footprint, TPO and the order flow tools, work on CME futures today: live with a real-time CME subscription, and delayed without one.