Hi,

I have a formula I am trying to work out. Say for example I back the fav at 1.3 for 10 then if the odds drift out to 1.5 I then lay for a bigger amount. How would I work out how much to green up at 2 taking into account I allready have 10 on at 1.3. I just cant seem to get my head around it.

I hope someone cleverer than me can work it out.

Thanks