Week of 11 February 2019: Bitcoin goes nowhere while Ether gains 6.9% on light volume
When two crypto assets that usually move together end the week in opposite directions, how much of the gap is signal and how much is a quiet, thinly traded week?
BTC closed 3,667.58, down 0.33% for the week. ETH closed 133.75, up 6.9%, lifting the ETH/BTC ratio 7.25%. Both saw dollar volume below their prior 12-week averages (BTC 0.52x, ETH 0.71x), and BTC realised volatility was 20.3% annualised.
What the data shows. BTC traded a narrow 3.7% range, opening at 3,679.75, dipping to 3,568.11 on Thursday 14 February, and closing at 3,667.58 — a 0.33% weekly loss that ranked at the 48th percentile of the 52 weeks of history recorded. Its largest hourly move was just -0.91%. ETH behaved differently: it fell to 118.18 on Tuesday 12 February, then rallied, with Sunday 17 February delivering a +9.03% day and a +2.24% hour late in the UTC session. ETH's 6.9% weekly gain ranked at the 75th percentile, and the ETH/BTC ratio rose 7.25%, so the two assets moved in opposite directions for the week.
What it does not show. The data cannot say why ETH outperformed. A rising ratio alongside an hourly correlation of 0.74 — close, but short of lockstep — is consistent with either ETH-specific buying or BTC-specific selling, and the candles do not distinguish them. Both assets also traded below their prior 12-week average volumes, so the divergence arrived without a surge in participation. No funding-rate data is available for this week, so the leverage behind ETH's move cannot be read here.
What a careful desk would check. A 7.25% ratio move built on 0.71x average ETH volume is a thin signal. A desk would look for the ratio move to hold or extend on heavier volume in later weeks before treating it as a change in relative trend. The Sunday timing of ETH's high and largest hour also matters: moves that arrive in the final session of a week are easier to fade than moves built across several days.
Ether against Bitcoin. ETH sat 86.25% below its 52-week high against BTC's 68.72%, so the week's divergence closed only a small part of a wide gap between the two drawdowns.
What would change this reading
- If the ETH/BTC ratio holds above its prior level in later weeks on heavier volume, this week's 7.25% rise reads as a genuine shift rather than a thin-week effect.
- If BTC volume returns towards its 12-week average while price stays near 3,667.58, the flat week gains meaning as an established balance rather than an absence of trading.
- If ETH gives back the +6.9% gain in a week with light volume again, the Sunday rally looks like position-driven rather than demand-driven.
Terms
- realised volatility
- how much the price actually swung over a period, expressed as a yearly percentage
- ETH/BTC ratio
- the price of one Ether divided by the price of one Bitcoin; it rises when Ether outperforms Bitcoin
- percentile
- the share of past weeks with a lower value; the 48th percentile means 48% of past weeks were lower