A centerline/non-chart indicator version of Everget's Supertrend script for use in NNFX-style indicator setups, with the emphasis on this indicator NOT adding visual clutter to the main charting area with a baseline indicator already present.
This is literally the EXACT same script as Everget's Supertrend, but not drawn on the chart and with the fill/stop and fill/state level removed.
Adjust to your timeframe/asset and backtest/forward-test accordingly.