I’ve been thinking for a while about porting this PineScript to MT5.

It’s a slightly different kind of RSI.

https://www.tradingview.com/script/ONhi ... d-RSI-NAL/

1. Overview

Sigmoid RSI | NAL is an adaptive momentum-regime indicator built from a transformed RSI engine, sigmoid weighting, and two independently adaptive smoothing layers.

Instead of using raw RSI values directly, the indicator recenters RSI around its midpoint and passes the result through a sigmoid transformation. This reshapes the oscillator into a smoother 0–100 momentum curve while preserving directional pressure around the central regime.

The final signal is refined through volatility-sensitive smoothing and an optional momentum-driven signal line, creating a more adaptive structure than a standard RSI with fixed smoothing.