Building a Mean-Reversion Signal in Pine Script for UAE Blue Chips
A quantitative look at combining RSI, Bollinger Bands, and volume-profile thresholds to generate disciplined entry signals on ADX and DFM names.
By Ali Zaigham Agha · · 2 min read · Last reviewed: 2026-06-05
Why Mean Reversion?
In relatively less efficient markets, large-cap names can overshoot on retail sentiment and macro headlines. A mean-reversion overlay does not replace fundamental analysis — it adds a **disciplined entry discipline** to a fundamentally sound watchlist.
The Building Blocks
- **RSI(14)**: Identifies short-term overbought/oversold extremes.
- **Bollinger Bands**: Measures volatility-normalized deviation.
- **Volume profile**: Confirms whether the move is distribution or noise.
Pine Script Implementation
```pinescript
//@version=5
indicator("UAE Mean Reversion Signal", overlay=false)
rsiValue = ta.rsi(close, 14)
bbLower = ta.bb(close, 20, 2).lower
bbUpper = ta.bb(close, 20, 2).upper
avgVolume = ta.sma(volume, 20)
oversold = rsiValue < 30 and close < bbLower and volume > avgVolume * 1.2
overbought = rsiValue > 70 and close > bbUpper and volume > avgVolume * 1.2
plotshape(oversold, "Oversold", shape.triangleup, location.bottom, color.green)
plotshape(overbought, "Overbought", shape.triangledown, location.top, color.red)
```
Risk Management
No algorithm removes risk. The signal works best when:
1. The stock is in a primary uptrend on a higher timeframe.
2. Position sizing is volatility-adjusted.
3. A hard stop is placed below the recent swing low.
Conclusion
Quantitative tools like Pine Script help institutionalize discipline. The value is not in the signal itself, but in the **process it enforces** around entry, sizing, and exit.
Want a Second Opinion on Your UAE Strategy?
Send your UAE stock watchlist, a Pine Script idea, or a trading rule for a free review. I'll check whether your edge is repeatable or just a backtest artifact.
Request a free review at [alizaighamagha.com/#contact](https://www.alizaighamagha.com/#contact).