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Inertial RSI

By LuxAlgoApr 3, 2026

Inertial RSI is an indicator on Vela, our next-generation charting platform, written in Pine Script®.

Static chart image

Inertial RSI rebuilds the Relative Strength Index around a forced-persistence engine. Instead of committing to one fixed lookback, it tests every integer length between your Minimum and Maximum settings on each bar and keeps the candidate that lands closest to the previous final reading. Smoothing therefore happens at the source of the calculation, not through lag-heavy filters bolted on afterward, producing a steadier oscillator that holds its momentum state until price genuinely earns a change.

How to Trade the Inertial RSI?

  • Hold above 50: bullish momentum in control. The gradient fill makes sustained holds easy to spot for trend continuation.
  • Hold below 50: bearish pressure dominant, supporting a short-side bias.
  • Cross above the dotted signal line: improving momentum, strongest when it agrees with the centerline side (above 50 for longs, below for shorts).
  • 60/40 extremes: the default overbought and oversold levels (both adjustable), with a triangle on the price chart when the line exits either zone; transitions in and out arrive more smoothly, helping separate true extremes from noise.

As with any oscillator, these reads earn more trust alongside market structure, support and resistance, or trend analysis than in isolation.

Inertial RSI Settings

  • Minimum Length: the shortest RSI lookback the optimization may test, the floor of the search range.
  • Maximum Length: the longest available lookback; a wider min-to-max range adapts across more conditions at some processing cost.
  • RSI Smoothing: a final SMA pass over the inertial output for a cleaner line.
  • Signal Line Length: the SMA length behind the dotted signal line.
  • Show Gradient Fill: toggles the momentum fill between the RSI and the 50 centerline, with bullish and bearish colors adjustable.

Frequently Asked Questions

Free to use

Run it on Vela. Go further with a paid plan.

  • Up to 500 Custom Alerts, with webhook automation
  • Up to 10× the chart history of Free
  • Orderflow lookback up to full history
  • More Quant usage to customize it, plus extra usage when you need it
  • Futures data alongside crypto, stocks, forex and commodities
See plans

Also works on

TradingView
Original indicatorBuilt in-house by LuxAlgo
All 54 RSI indicators

Run it on Vela. Make it yours with Quant.

Open this indicator free on Vela, our next-generation charting platform. Then ask Quant, our coding agent built into Vela, to retune it or turn it into a backtested strategy of your own.