Sorry, there isn't a trigger modifier to do all that, only the initiial back and lay at minus 2 ticks. You will need a combination of BACK, LAY and CLEAR triggers to do this.
1. BACK at 8.
2. If back bet matched use CLEAR to clear the bet ref cell so that a further bet may be placed then LAY at minus 2 tick below 8.
3. If lay bet matched place keep in play level profit bet using CLEAR and LAY-IP. You will need to calculate the correct stake.
4. If lay bet from step 4 not matched and market turned in play then use CLEAR and LAY to place the lay bet at 8.
If the above sounds too complicated then you may need the help of a developer. See
http://www.gruss-software.co.uk/forum/v ... m.php?f=12