When using a stop loss the margin should generally be reduced, but the margin shown on the platform stays the same as when there is no stop loss in place.
For example, if placing a spread bet on the FTSE 250 at price of 17000, for £1 per pip movement the margin is £1 x 17000 x 10% = £1700
If adding a stop loss at 100 points away (so 16900), with slippage factor of 20% the margin should be (1 x 17000 x 10% x 20%) + (1 x 100) = £340 + £100 = £440. But when I add the stop loss the margin stays at £1700.
Can anybody shed some light on this?
Thanks
Angus