BS lost all credibility when it turned out that he'd only been trading for a couple of years and not even tried spreadbetting until quite recently. If he really knew how to trade profitably he wouldn't waste his valuable time making hindsight videos for CMC.
Wasn't this on ETX's ordinary platform, which is of the Ariel variety, and has tweakable designer slippage. (Allegedly, although they did boast about it on their website at one time).