This could be exploitable. On the other hand, maybe it's nothing. Usually I follow up these things on my own. In this case however, going public could be a service to the trading community and the industry itself. You follow two rigged bucket shop forex dealers who, for some reason (such as your current positions, etc), have a pattern of quoting different prices for the same currency pair. Bingo: arbitrage opportunity, i.e. buy low and sell high simultaneously (with either dealer, respectively) for a risk-free profit. This would not be scalping, since only one transaction with each dealer (buying the low quote or selling the high quote) is necessary to lock in your gain.