Why do all sites have different stock quotes for goods, gold, oil, etc.?

Question

Electronic commerce

I looked at many sites and everywhere the latest quotes are different, for example, gold or oil.
Is it because each site does not have time to update?
Or take data from different exchanges? Or maybe something else?
Which site is considered the source.

Answer 1

Probably "Sites" are intermediaries, and each has its own percentage. As far as I know, just like that, any person cannot directly trade on the stock exchange.

Answer 2

well, firstly, a feed from the exchange with every second update is very expensive;
secondly, there are a lot
of exchanges; thirdly, they trade not only on exchanges

Answer 3

There are different exchanges, there are different agencies, there are different indices. Universal boards with universal world prices for gold, oil, etc. does not exist. Everywhere will be, maybe slightly, but different.

Answer 4

Note. Each broker has a clause in the contract according to which you cannot dispute the quotes provided by him, referring to the quotes of another broker.