What index is the bitcoin price based on for the markets?

like title says i need to know exactly the btc price was when i made a purchase. anyone know a good website for this and if agora/evo uses bitstamp or another index??

Thanks :)


Comments


[1 Points] throwahooawayyfoe:

it's based on USD. most sites take their live pricing from bitstamp. preev.com is a good resource. they give a weighted average price based on all the various larger exchages like bitstamp and coinbase.