Bollinger Midline
The Bollinger midline is the middle band of the Bollinger Bands — a 20-period moving average marking the recent center of gravity of price. Its slope, and price’s position relative to it, are staple reads for the mid-term trend.
Bollinger Bands consist of three lines: a middle band (typically a 20-period simple moving average) plus an upper and lower band offset by standard deviations. The middle band — the midline — is the skeleton of the whole channel, marking where the last 20 periods of price have their center of gravity.
The most valuable way to read the midline is not “price touches it and bounces” but two structural signals: first, price holding above a rising midline means bulls own the center of gravity — a healthy trend; second, the midline flattening while price whipsaws across it is early evidence of trend exhaustion turning into a range.
In strong trends the midline often acts as pullback support or bounce resistance: in an uptrend, a retest of the midline that holds is the classic add-with-the-trend location; a decisive break below it with the midline rolling over means the trend structure must be reassessed.
Inside CycleMaster’s cycle classification, the Bollinger midline is a core input: paired with a long-term average such as the EMA250 yearly line, the yearly line defines the long-term bull/bear divide while the midline tracks mid-term rhythm — together they help carve out the four states. The cycle label you see on a symbol page has this line working underneath it.
FAQ
Same line, different context. Inside the Bollinger framework it also carries band-width (volatility) information — midline slope combined with bands squeezing or expanding says more than an isolated moving average.
A single break is not a sell signal — pullbacks in strong trends routinely pierce the midline and recover. What matters is a decisive break: several consecutive closes below with the midline turning down. That kind of structural confirmation is exactly where systematic classification beats eyeballing.
Related terms
CycleMaster labels every symbol with its cycle state and macro resonance verdict in real time — and signals never repaint.