Spread betting companies play a deep game, you can only really know what is true and false is you have worked for them.
Discussions are discussions.
Only wish to write one example, don't have time to write massive articles at the moment. I am not here for an argument, but this is one tactic and I have many more.....
Let me give you an example for scalping the client.
Your trading DOW, you're in a BUY position, the DOW moves in your favour and hits your limit. Your trade is exactly settled at the price you requested, although DOW climbs higher after your exit as well.
However, let's take this scenario, you BUY DOW but it falls against you, when your non guaranteed stop is hit the price you get out at has slippage attached to it (always, even when the price was traded). Most spreadbetting companies do this, therefore the spread on say the DOW is really 4/6points spread plus slippage 3 = 8/10 points + loss. The guaranteed stop already has the slippage programmed into it as the companies are aware that during market hours the price does not gap hugely
One of the chaps for Capital spreads said 21% of people win, so the identified looser accounts are not hedged they want them to loose money quickly and fast! They even asign managers to loosing accounts or people who trade big to smash them.
This is a fact, the game is deep..The algorithms they use are ingenious pieces of work that are created by high level of math mathematicians...
The main markets manipulated and the SB companies manipulate the price, therefore your system must bypass 2 price variations, I have an image in my head, its a spiders web overlayed with another spiders web which is offset. Your finger needs to go through them without touching the sides to be successful.