Double Bollinger Zones

Double Bollinger Zones runs two band pairs off one shared 20-period basis — inner bands at one standard deviation, outer at two — turning the chart into a regime map of buy, sell, and neutral zones. Faithful to the Double Bollinger Zones method, it claims a trend only after consecutive closes hold a zone, drops back to neutral when the zone is lost, and reports zone, regime, close count, and depth in a dashboard.

How to Trade the Double Bollinger Zones?

• Uptrend qualified: the required run of closes (2 by default) holds the buy zone between the upper bands — territory to follow, not stretch to fade.
• Zone lost: a close back inside the inner band drops the regime to neutral — the first warning the method gives.
• Pullback holds the floor: an intrabar tag of the one-deviation line that closes back inside keeps the regime — the continuation entry, invalidation just beyond the boundary.
• Full traverse: a regime qualified in one outer zone after the opposite one — the map's completed regime change.

Double Bollinger Zones Settings

• Length (default 20): lookback of the shared basis and standard deviation.
• Source (default close): series for the basis and deviation; zone residence is always judged on closes.
• Basis Type (default SMA): the single shared average both pairs run off.
• Inner Multiplier (default 1) and Outer Multiplier (default 2): the regime boundaries and far zone edges — the method's defining pair.
• Confirmation Closes (default 2): consecutive closes required to qualify a regime; raise it in choppy tape.
• Zone Boundary Buffer (default 0): extra deviations a close must clear — the second whipsaw guard.
• Show Dashboard (default enabled); Regime-Colored Basis and Zone Gradient Fills enabled, Regime Markers disabled — alerts cover those events.

Frequently Asked Questions

How is this different from ordinary Bollinger Bands?

Bollinger Bands draw one pair, usually read for reversion toward the basis; adding the inner pair creates zones that can also say "follow this" once price holds beyond a deviation. Same statistics, opposite default instinct.

Why do wicks through a band change nothing?

Residence is judged on closing prices by design: a series usually stays within one deviation of its own average, so a close holding outside that band says something noise rarely does.

What helps in whipsaw-prone markets?

Both guards are settings: raise Confirmation Closes so single prints cannot claim a regime, and give Zone Boundary Buffer a small positive value. Zone crossings get cheap whenever the bands compress.