The “Continuous” mode can be enabled under “Settings” > “Cycle settings”: when you turn it on, then the balance will be carried on when a new cycle starts.
Continuous mode connects all intervals together. So the balance on the main screen shows your overall balance since you started the app. You can see how much money you had left over in older cycles under “Analysis” > “Overview” by tapping on the left arrow.
Cycle 1: -1400
Cycle 2: +200
Current cycle: +50
The balance on the main screen shows -1400+200+50 = -1150