Week of 29 September 2025: Bitcoin gains 10.09% and closes 1.35% below its 52-week high
When both assets rise in a single week and close near their weekly highs, what does the week say about trend, and what can it not say about what comes next?
BTC rose from 112,163.96 to 123,482.31 (+10.09%) and ETH from 4,142.16 to 4,514.32 (+8.98%). Both weekly lows came on Monday and both highs on Sunday, with each high falling after its low. BTC closed 1.35% below its 52-week high at the 87th percentile of its 398 weeks of history.
What the data shows. BTC's low of 111,560.65 arrived at 07:00 UTC on Monday 29 September, 0.54% below the week's opening price. ETH set its low of 4,082.25 at 13:00 UTC the same day. Both assets then rose through the week to Sunday highs — 125,708.42 for BTC and 4,618.17 for ETH — a range of 12.68% and 13.13% respectively, with the low preceding the high in each case. The best day for both was Wednesday 1 October (BTC +3.99%, ETH +4.89%), which also held the largest hourly moves: +1.37% for BTC and +3.51% for ETH in the hour starting 08:00 UTC. The worst days were mild (BTC -0.23%, ETH -1.66%). Both closed in the upper third of their weekly ranges. BTC dollar volume was 1.25 times its prior twelve-week average; ETH volume was 0.8 times, below its average. The two assets moved closely but not identically (hourly correlation 0.80), and the ETH/BTC ratio fell 1.00%, so BTC's weekly gain exceeded ETH's.
What it does not show. A weekly close near the high records where price stopped, not where it goes. Nothing here identifies who was buying or whether the buying was leveraged. The percentile reading places this week among the stronger ones, but a strong week inside a trend is not evidence the trend continues. ETH's below-average volume is a fact, not an explanation: the data cannot say whether it signals weak conviction or simply fewer large trades.
What a careful desk would check. BTC's realised volatility — the size of the swings that actually happened, scaled to a yearly figure — was 31.4%, against 50.0% for ETH. The largest hourly move was modest (1.37% for BTC), so a position sized for a normal week was not badly tested this week. A desk would compare its risk limits with the prior four weeks' mixed record (BTC +2.67%, +3.72%, -0.03%, -2.66%) to confirm the sizing reflects the trend rather than this single week.
What would change this reading
- If BTC trades in a later week below this week's low of 111,560.65, the steady rise reads as a range that has failed rather than a trend.
- If ETH volume stays below its prior twelve-week average while its return trails BTC further, the ETH/BTC ratio decline of 1.00% becomes a persistent divergence rather than a one-week gap.
- If funding rises well above this week's averages (0.0069% per eight hours for BTC, 0.003% for ETH), the rise would be increasingly carried by leveraged longs, which raises the cost of holding them.
- If a later week closes BTC further below its 52-week high than this week's 1.35%, this week's proximity to that high was a pause rather than a break above.
Terms
- close location
- where the week's closing price sits within the week's high-to-low range; a higher figure means the close sat nearer the weekly high than the weekly low
- realised volatility
- how much the price actually swung over a period, expressed as a yearly percentage
- percentile
- the share of past weeks with a lower value; the 87th percentile means 87% of the 398 recorded weeks were lower