Bitcoin Weekly Update
Weekly Highest Price was 16,930.90 USD on December 27, 2017
Weekly Lowest Price was 12,350.10 USD on December 30, 2017
Steem Weekly Update
Weekly Highest Price was 3.71 USD on December 26, 2017
Weekly Lowest Price was 2.54 USD on December 30, 2017
Source: https://coinmarketcap.com/