You can check for an imbalance by Storing the P/L of every selection
Then 'store a value from a range of values'
https://www.betangel.com/user-guide/sto ... alues.html
and store the max value from those P/L stored values
Then add another 'store a value from a range of values'
this time store the min value
Finally add a Stored Value condition to your green up rule to test the difference between the min/max values is within your tolerance level
Remember depending on your stakes and the odds you are greening up at you may not always get everything even to the penny/pound, so it would be better to create a range ie, the difference between the min/max must with within 10p, or if using larger stakes you might want to say within £5 of each other