How is the price of ethereum calculated? I mean do you take price from a particular platform/website or you take into account multiple prices from various sources and average them out.

I would suggest that you must use a average of a couple of price stamps and determine the price because a single whale can fluctuate price quite easily and benefit from you guys. I will check out your telegram channel and hopefully it explains more.
I am still reading and learning more about this, looks good.