Forex17 Bollinger Channel

This indicator displays only the upper and lower bands of a Bollinger-style volatility channel, without plotting the central moving average. Its primary goal is to provide a clean and flexible volatility envelope, allowing traders to focus on price behavior relative to the channel boundaries, while maintaining full control over chart aesthetics and composition.

Unlike traditional Bollinger Bands, where the middle moving average is always displayed, this indicator uses the moving average internally for calculation purposes only. The central line is intentionally hidden to reduce visual clutter and to give the user the freedom to manage the midline separately if desired.

Both the upper and lower bands can be assigned independent colors, enabling clearer visual distinction and better adaptation to different chart themes or personal preferences. Traders who wish to recreate the traditional Bollinger Bands appearance can do so by adding a separate moving average indicator with matching parameters, allowing full customization of the midline style and presentation.

The indicator uses a moving average as the internal reference for band calculation. By default, it operates with a Simple Moving Average (SMA), ensuring transparency and consistency. Additionally, other averaging methods such as Exponential (EMA), Smoothed (SMMA), and Linear Weighted (LWMA) are supported, allowing the volatility envelope to be adapted to different market conditions and analytical preferences.

Key characteristics:

Displays upper and lower volatility bands only
No middle line plotted (calculation-only)
Independent color settings for upper and lower bands
Supports multiple moving average types (SMA, EMA, SMMA, LWMA)
Clean, minimalistic chart appearance
Fully configurable period and deviation
Compatible with all symbols and timeframes
Lightweight and performance-oriented

Typical use cases:

Volatility expansion and contraction analysis
Observing price interaction with volatility extremes
Channel-based market structure analysis
Breakout or containment studies
Confluence with price action or external indicators
Custom Bollinger-style setups with user-defined midline appearance

This indicator does not provide trade signals, alerts, or automated decisions. It is a visual analytical tool intended to support discretionary or systematic trading approaches, depending on the user’s methodology.

The indicator is designed to integrate seamlessly into existing workflows, allowing traders to build their own interpretation layers while keeping charts organized, flexible, and visually efficient.