The BitMEX .ETCXBT30M Index is a 30-minute TWAP of the Eth. Classic price at Poloniex ending at 12:00 UTC from the .ETCXBT Index. These values are used for settlements. The TWAP is calculated using values from the BitMEX .ETCXBT index.
.ETCXBT30M Index Historical Values
This is the 30-minute time-weighted average price of BTC_ETC on Poloniex, printed every 1 day.
The last 100 measurements are available here. More results can be retrieved from the API.