None of them are banks. They are exchanges and brokers who facilitate or pass on liquidity. You need to read the fine print to see whether a trading venue reserves the right of last look. IB does not. Neither do multiple other venues. News trading in my book should not be discouraged. Making markets inside the spread unless you are a market maker should. Choose the broker that suits your approach to trading.
none of them are banks ?
- Direct Access to Interbank Quotes
No hidden price spreading, no markup, no kickbacks. Just the combination of real time prices from 17 of the world's largest FX dealing banks plus a transparent, low commission that avoids the conflict of interest of FX platforms which deal for their own account.
https://www.interactivebrokers.com/en/index.php?f=759