Bitcoin Bull Market Support Band

The 20-week SMA is the arithmetic mean of the most recent 20 weekly closes. The 21-week EMA gives more weight to recent prices. Alphabit initializes it with the average of the first 21 closes, then applies the update: new EMA = (new weekly close × 2/22) + (previous EMA × 20/22).

Both summarize roughly five months of price history. The band runs from the lower average to the higher one; either average can be the upper boundary. These are the conventions used by this site’s chart, so data sources, weekly boundaries and EMA initialization can cause differences from another provider.

Suppose the SMA is $80,000 and the EMA is $82,000. A weekly close of $83,000 is above the band; $81,500 is inside it; $79,000 is below it. These are illustrative numbers, not current market readings.

The midpoint is $81,000. A close of $81,500 is above that midpoint but remains inside the band. To determine whether price has cleared or lost the entire band, compare it with both boundaries. Swapping the order of the two averages does not change these definitions.

The sparkline shows each weekly close’s percentage distance from the band’s midpoint over approximately four years. Above zero means above the midpoint, which may still be inside the band. Use the full chart to inspect both boundaries and the weekly candles. A wick below a line and a weekly close below it are different observations.

Price can move below both averages before the averages cross each other. An EMA/SMA crossover describes their relative ordering; a price break describes the close’s position against the band. Inspect how long a move has lasted and whether the averages are rising or falling. Neither event alone proves a bull or bear market has begun.

The full chart marks a change in EMA/SMA ordering only if it persists for at least three weeks. A historical marker is drawn on the first week of that run, but requires subsequent weeks to confirm it. Treating the marked date as a signal already known that week would use future information. These markers compare the averages, not price against the band.

Moving averages lag price. Sideways markets can produce repeated crossings, and a price break can recover without becoming a prolonged bear market. The band does not measure holder cost basis, liquidity or a probability of loss. Past chart patterns do not establish a reliable future trading rule.

For another perspective, explore MVRV Z-Score or the Bitcoin valuation model comparison. Agreement between indicators with overlapping inputs is not automatically independent confirmation. Alphabit’s risk model guide explains its separate composite score.