Bitcoin Bull Market Support Band: Weekly Chart

Recent crossovers

It's the zone between two moving averages of Bitcoin's weekly close — the 20-week simple moving average (20W SMA) and the 21-week exponential moving average (21W EMA). Both track roughly the same five months of price action, but the EMA weights recent weeks more heavily, so the two lines diverge slightly and trace out a band rather than a single line.

Both averages summarize roughly five months of weekly price history. Pairing a simple and an exponential average of similar length creates a range. Price above both lines is above the band; price between them is inside it; price below both is below it. These describe price relative to trend, rather than establish a buy or sell rule.

• Bullish crossover — the 21W EMA crosses back above the 20W SMA and holds for at least three weeks, consistent with recent price action strengthening relative to the longer trend.
• Bearish crossover — the 21W EMA crosses below the 20W SMA and holds for at least three weeks, consistent with recent weeks weakening relative to the trailing trend.
• Crossovers that flip back within a couple of weeks (whipsaws) are filtered out and not marked — only a sustained change in ordering counts.

• Both averages are computed on weekly closes from the same BTC history that powers the risk model.
• The 21W EMA is seeded with a simple average of its first 21 closes, then compounds forward — the standard convention.
• Crossovers require the new EMA/SMA ordering to hold for at least three consecutive weeks before being marked.
• Historical markers are placed on the first week of that run, but confirmation requires the later weeks. They were not confirmed signals on the marked date.
• An EMA/SMA crossover is different from Bitcoin's price moving above or below the band.
• Past band behavior is not a guarantee of future behavior.

How to read a move below the band

Check whether the weekly close is below both averages, rather than just below the midpoint. Then inspect how long the move has lasted. Moving averages lag price, and sideways markets can produce repeated crossings.

A break describes weakening price relative to its recent trend. It does not prove a bear market has begun. Read the support-band guide for worked examples, or compare Bitcoin models to understand the information each adds.