Week of 14 October 2019: Bitcoin slips 0.63% while Ether falls 3.18% on light volume
When both assets fall for the week but one closes in the upper third of its range and the other in the lower third, what does that split tell a trader?
BTC moved from 8,275.24 to 8,223.35 (-0.63%) and ETH from 180.98 to 175.22 (-3.18%). Both set their weekly lows at 08:00 UTC on Friday 18 October. Dollar volume ran below the prior twelve-week average for both: 0.68 times for BTC, 0.88 times for ETH.
What the data shows. Both assets peaked first and bottomed later: BTC's high of 8,403 came at 00:00 UTC on Tuesday 15 October, its low of 7,816.01 at 08:00 UTC on Friday 18 October, a range of 7.51%. ETH followed the same clock (188.37 high, 168.66 low) but over a wider 11.69% range. The week's largest hourly moves were -1.93% for BTC in the hour starting 05:00 UTC Friday, +1.94% for ETH in the hour starting 16:00 UTC Monday. The two assets moved together closely (hourly correlation 0.80), yet the ETH/BTC ratio fell 2.57%, so Ether weakened against Bitcoin rather than merely moving with it. Both closes sat well below their 52-week highs: BTC by 41.1%, ETH by 51.04%.
What it does not show. The data records prices, not reasons. Nothing here identifies who traded or why Ether lost more. The identical low timestamps show the two markets reached their lows in the same hour, but not whether one led the other.
What a careful desk would check. BTC's close location was 69.4% of the weekly range (upper third), ETH's 33.3% (lower third). That gap matters: BTC finished the week in the upper third of its range after a +3.44% Sunday, its best day, while ETH's best day was Monday's +3.17% and its close sat in the lower third. A desk would ask whether the divergence persists or reverses, and would treat the light volume (0.68 and 0.88 times the prior twelve-week averages) as a reason to weight the week's readings less heavily. Realised volatility, a measure of how much prices actually swung, scaled to a yearly figure, was 34.3% for BTC and 43.3% for ETH, so stop distances and margin buffers would be sized against those figures rather than assumed.
Ether against Bitcoin. Of the prior four weeks, BTC was down three and ETH down one, yet this week ETH fell 2.55 percentage points further. The relative move, not the absolute one, is the week's distinguishing fact.
What would change this reading
- If BTC trades below its weekly low of 7,816.01 in a later week, the Friday floor reads as a step in a decline rather than a pause.
- If ETH recovers above its weekly open of 180.98 while BTC holds near 8,223.35, the ratio loss of 2.57% looks temporary.
- If volume returns above the prior twelve-week averages while prices hold this week's range, the quiet week reads as consolidation rather than apathy.
- If BTC funding stays pinned at 0.01% per eight hours, the futures market is signalling neither side under pressure to close.
Terms
- close location
- where the week's closing price sits between the weekly low and high, as a percentage; a value near the low means the close came close to the week's bottom
- realised volatility
- how much the price actually swung over a period, expressed as an annualised percentage
- hourly correlation
- how closely two prices moved together hour by hour, from -1 to 1