The Bull Market Support Band is formed by Bitcoin's 20-week simple moving average and 21-week exponential moving average, plotted together as a band. In bull markets, price has repeatedly bounced off this band from above; in bear markets, it has repeatedly rejected from below. Which side price is on says a lot about the market's broader trend.
What Is the Bull Market Support Band?
The Bull Market Support Band combines two moving averages of very similar length — the 20-week simple moving average (SMA) and 21-week exponential moving average (EMA) — plotted together as a band rather than a single line. Because the two averages are so close in length, they naturally track each other closely, forming a relatively narrow band rather than two widely separated lines.
Why Two Moving Averages
Using two closely-related averages instead of one gives the indicator a small but meaningful advantage: a band, rather than a single line, is less prone to the whipsaws that a single moving average can produce when price oscillates right around it. The band effectively defines a zone rather than a knife-edge, which more realistically reflects how markets actually test support and resistance — rarely at one exact price, more often across a range.
The Support-Becomes-Resistance Flip
The single most useful property of the Bull Market Support Band is its behaviour flip between market regimes. During a bull market, price has repeatedly pulled back to the band and bounced — the band acts as dynamic support. During a bear market, price has repeatedly rallied up to the band and been rejected — the same band now acts as resistance. Watching whether price is respecting the band as a floor or a ceiling is, in effect, a real-time read on which broader regime the market is currently in.
A genuine, sustained loss of the band as support during what had been a bull market has historically been an early warning that the trend may be shifting — well before slower, more lagging indicators would confirm it.
Reading the Zones
Our indicator page expresses price's position relative to the band as a percentage:
| Price vs. Band | Zone | Historical Interpretation |
|---|---|---|
| ≤ −25% | Deep Value | Far below the band — near major cycle lows, some of the best accumulation windows historically |
| −25% to −10% | Undervalued | Below the band but not extreme — band lost as support, a weak signal, but also appears during late-bear recoveries |
| −10% to +15% | Fair Price | At or near the band — the transition zone, no clear extreme in either direction |
| +15% to +50% | Elevated | Clearly above the band, consistent with an active bull market — band acting as a dynamic floor |
| ≥ +50% | High Risk | Far above the band — historically late-cycle overextension phases |
See today's live reading on our Bull Market Support Band indicator page.
Limitations
It's a trend regime tool, not a valuation model. Unlike indicators built on power-law fair value or on-chain cost basis, the Support Band says nothing about whether Bitcoin is fundamentally cheap or expensive — only about its current relationship to a specific technical trend line.
Bear markets can still see extended time above the band. Bull markets can sustain elevated readings for extended periods without a top forming — a high reading alone doesn't signal an imminent reversal.
Weekly-timeframe indicators react slowly. Built on 20–21 week averages, the band moves gradually — it won't catch fast, sharp reversals in real time.
How to Use It
The Bull Market Support Band is most useful as a macro trend filter: when Bitcoin is holding above the band, long-term investors typically continue steady accumulation; when price genuinely loses the band as support, that's a reasonable cue to shift toward more defensive positioning. Pair it with the Mayer Multiple and 200-Week Moving Average for a broader trend confirmation picture.
It's also one of the 21 inputs to our Cycle Compass composite score.
For a broader tour of the other major indicators worth knowing, see our guide to 10 On-Chain Bitcoin Indicators Every Investor Should Know.