The 4pm London spot rate is supposedly the standard, but I'm having trouble finding out if that's what I'm getting from Reuters.
First, I understand that currencies don't have just one exchange rate, since they're not centrally cleared. So depending on where you're trading, there could be a different spot price. So my interpretation of "4pm London spot" is the spot rate in London at 4pm GMT. Is this correct?
If it is, then how do I find out if http://www.reuters.com/finance/currencies is giving me the London price?