Ok so the eur/usd has more liquidity than any other instrument of trading. So If I was a multi millionaire or billionaire and opened a trading account of 10 million, I would want some kind of guarantee that the broker would be able to pay out on very large trades. If the liquidity is there in eur/usd but the broker has problems filling the orders on a successful trade, then would I get some sort of message saying error. I just wonder what the big boys do and is there some way of checking if brokers can pay out multi million dollar trades that happen in a few days. Cheers John