Hi
Yes, there are probably a few ways. But your original requirement was for time since start to be 70 mins, and the conditions structure was built accordingly, so you will need to change this.
If you know the time you are logging in, you can change the condition: minutes since the off. So if you are going to log in at 50 minutes, you can change the condition to (88-18-50) = minutes since the off is greater than 20. You can set this up as a user variable, which will make it easier to input.
You can just delete the condition: minutes since the off, and you may need to re-structure the score conditions. The trigger will then work immediately based only on current score.
You could also run 2 triggers on different profiles (using caution for data requests):
profile 1 = markets added before start of game
profile 2 = markets added after start of game
Also, consider using variable trigger expression event_start, which is "The scheduled date and time of the market's start. In most cases it does not coincide with the time of the actual start."
You can replace minutes since the off with trigger expression event_off. Then view it in the user variables window, and manually edit it by right-click. (event_start and event_off are in date/time format, so you will need to calculate using date/time format) - maybe better to make a user variable for this and then just edit it when you log in.