The index is weighed to 10,000 on the 1st of September, 2018.
The formula used should be the same as the one found in BGCI, with the result being the product of all individual market caps to the power of their own cap that is divided by the sum of all caps.
If you enjoy my scripts and would like to show appreciation, I take tips in the form of depreciating assets:
XRP: rEb8TK3gBgk5auZkwc6sHnwrGVJH8DuaLh | 106703134
Both recently updated :)