[M Puri]

If I set my loss at 200 pounds and the margin value is at 3,000 what does this represent?

[M Puri]

New to this so may seem silly question. I set my loss to 200pounds but the margin is in the thousands. What does this stand for?

[Setting order at weekend to be executed Monday when market opens]

I would like to place my orders today Sunday, to be executed at start of business on Monday. 

Also I have 3 orders each with a stop of 20 points which I( believed gave me a margin of 3 x 20 x 10 pounds risk =600 but it is showing as much higher, around 900. Can anyone please explain this.