In this case, these are relatively high-risk strategies in which the bet is changed based on certain parameters. Some strategies use increasing/decreasing the bet regardless of the outcome of the round, but much more often you will encounter strategies in which the bet is adjusted with respect to the previous result. In such a case, we also distinguish:
Negative progressives
work with adjusting the bet if the previous round ended in a loss (negative outcome)
Positive progressives
are their exact opposite and the bet is changed after a win
It is necessary to emphasize that they work with relatively high bankrolls. In the case of a series of losses, you may lose your entire fortune. Thanks to this, you can lose your allocated funds even before you make a profit. However, in the long run, they can actually bring some profit in the end.