by greenfingers » Tue Aug 04, 2009 11:25 am
The increment between odds varies depending on what the odds are. Below 3, odds decrease 0.02 at a time - i.e. 2.98, 2.96 etc. Above 3 they increase 0.05 at a time - i.e. 3.05, 3.1 etc
So, if you back @ 3 and the market drifts 5 ticks, the market will be at 3.25.
Your loss before redding-up is: $100*0.25=$25. (0.25 is 3.25-3). Redded-up the loss is therefore 25/3.25=$7.69
BTW, backing at the point where odds-increments change (e.g. at 2,3,4,6 etc) is a very poor move - in this example, you are risking 0.05 if the market drifts 1 tick and you only stand to make 0.02 if the market does indeed shorten 1 tick. I don't like those odds!