xjo weekend zoomba lounge, page-129

Hey raider, no that's not what slippage is.

Say for example you wanted to buy 100k BHP at 3100 a share. On the physical the ask price is at 3100 however there aren't enough shares available to cover the order at 3100. In total you would need to buy up to 3108 in order to fill 100k shares. Now an honest CFD providor would simply fill your order at the collective average and that would be reasonable. As I said an honest CFD provider would do that, what really happens is they automatically jump to the furthest from your target as possible so in that case the entire fill for the order you placed at 3100 would actually go through at 3108.
When you query this the default response is that we had a number of orders to cover in that price range, although you know they're full of shit you can't actually prove that they didn't have any orders. Slippage is designed to protect them from illiquid depth, yet in reality it's a tool to increase their profit.