Mean Reversion Corridors [AGPro Series]Mean Reversion Corridors
🔹 Overview
Mean Reversion Corridors is a volatility-adaptive deviation framework that maps how far price has stretched from a chosen fair-value center and classifies that stretch into two actionable zones. An inner corridor marks the early reversion band where price is meaningfully extended but not yet extreme; an outer corridor marks statistical exhaustion where continuation becomes less probable under normal conditions. A higher-timeframe trend filter separates controlled mean reversion from failure-continuation expansions, so traders can tell fading the edge from respecting a real break — all from a single clean overlay.
🔸 Unique Edge
Most band systems (Bollinger, Keltner, ATR channels) offer a single width engine and a single band pair, leaving the trader to guess whether a tag is an exhaustion or a breakout. Mean Reversion Corridors is built around three ideas that work together:
- A dual-engine width unit that linearly blends ATR (range-based) and Standard Deviation (dispersion-based) so the corridor is stable on both gap-heavy and low-dispersion regimes.
- A two-layer corridor with distinct roles — inner for early stretch, outer for exhaustion — rendered as transparent zones you can read at a glance.
- A regime-aware state machine that uses a higher-timeframe trend filter to reclassify outer tags as either reversion candidates or failure-continuation, tracked as explicit REV and FAIL states with a bounded confirmation window.
🧠 Methodology
- Center Model — user choice of EMA, VWMA (volume-aware, default) or HMA (responsive), calculated on chart closes.
- Width Unit — the current volatility unit is a linear blend: (1 − blend) × ATR + blend × StDev, protected against empty volatility periods.
- Corridors — inner band at ±(width × inner multiplier), outer band at ±(width × outer multiplier). Stretch is reported in width-unit sigma.
- Trend Filter — the same center model is evaluated on a higher-timeframe via request.security with lookahead off, and its slope is normalized by ATR so the "strong" threshold is volatility-aware, not symbol-specific.
- State Machine — tracks the most recent outer-band extreme with a rolling 20-bar confirmation window. A reversion is confirmed only when price closes back inside the inner corridor and the trend filter is not strongly aligned with the original stretch. When the trend is strongly aligned, the outer break is reclassified as corridor failure (continuation).
- All conditions evaluate on confirmed bars to avoid repainting behavior.
⚡ Signals & Alerts
On-chart markers:
- REV — reversion confirmed back through the inner band after an outer extreme, trend-filtered.
- FAIL — corridor failure / trend-aligned continuation beyond the outer band.
Six bar-close alert conditions:
- Inner corridor entered — upside stretch
- Inner corridor entered — downside stretch
- Outer corridor hit — upside exhaustion
- Outer corridor hit — downside exhaustion
- Reversion confirmed
- Corridor failure (continuation)
⚙️ Key Inputs
- Center Model — EMA / VWMA / Hull
- Center Length and Volatility Length — independent lookbacks
- ATR ↔ StDev Blend — balance between range and dispersion engines
- Inner Corridor Width and Outer Corridor Width — in volatility units
- Trend Filter — enable, timeframe, length, strength threshold
- Visuals — outer-only mode, center line, fills, edge tags, state labels, label size
- Info Panel — show/hide, position (six options), font size
- Alerts — individually toggleable for each of the six events
📖 How to Use
- Start with the defaults on your main chart timeframe. The 34-period VWMA center, balanced blend and 1.0 / 2.2 inner/outer multipliers are chosen to work as a neutral starting point across liquid markets.
- Inner corridor tags are early stretch cues — they flag that price is extended, not that a turn is due. Use them as context for setups, not as standalone signals.
- Outer corridor tags with the trend filter neutral or opposed are the primary mean reversion setup; wait for a REV confirmation back inside the inner band before acting.
- When FAIL appears, the stretch is trend-aligned; treat the outer band as continuation, not resistance. This is the signal to stop fading.
- Use the Info Panel to read current state, reversion bias, trend regime and stretch magnitude in sigma at a glance.
⚠️ Limitations & Transparency
- This is an analytical tool, not a trading strategy or financial advice. It does not predict future price.
- Band-based classification assumes statistical behavior; during shocks, news events or illiquid sessions the width engine can lag.
- The trend filter uses a higher-timeframe slope — it reacts slower than short-term momentum by design, which is the intended behavior.
- Signals are evaluated on confirmed bars; intrabar crosses are not counted as events.
- Past behavior of any indicator does not guarantee future results. Always apply your own risk management.
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