This is just a look back on ETH and the nice move that it had on the weekly chart. This tightening pattern can be found on every time frame the weekly the daily the 4 hour etc....
This is a perfect example of a lower high and higher low tightening range before a massive move to the upside..
Keep an eye out for this tightening range on other charts as this is usually a great trading opportunity :) also if there is a tightening range on the 4 hour chart and also a bigger tightening range on the daily chart the direction the 4 hour chart breaks can give you a good indication on how likely the daily chart will break in the same direction
Anyway just an quick idea to keep the trading brain ticking over.. :)