Thanks guys, we really appreciate great discussions like this especially when things are not 100% clear. We've come to learn that we should rethink the way that we display spreads, or document it in a way that makes it clear how spreads affect your position, especially in conjunction with leverage.
Our spreads change dynamically to reflect the volatility of the market, the more volatile - the higher the spreads.
You might see this is an inconvenience, especially if you're trading around a price-action catalyst and the price moves a lot all of a sudden. However, you will find that the spreads are still comparable and competitive to those of traditional markets.
I don't think that our use of spreads detracts from our mission. We don't charge fees, and the spread is a natural part of any transaction and market.