Simple laying loss recovery
This is a basic loss recovery strategy where you add the previous loss to the next lay bet and revert to the original stake size once the bet has won.
Lay 4 EUR. Lost 5.6.
Lay 9.6 EUR. Lost 17.28.
Lay 26.88. And so on.
Here's the picture of a sample Win/Lose sequence after following this strategy in the HiLo channel while laying on Card 5 or further in the first round.