I wonder if somebody can tell me the right way to go about this. I want to make an automation file that will place a £100 lay bet on a horse if the BSP is < 4. I was doing this via the betfair site but that adjusts my stake in-line with the odds so i will always lose the maximum liability. If i have a list of 5 horses and the price for them is say 3.0 and then as the off approaches they start to drift over 4.0 then i don't want the lay bet to be placed. Conversely, if they are 5.0 and just before the off when the race is a little delayed, the price drops below 4.0 then i would like the £100 lay to be triggered.