Inverted Middle
An inverted middle is very risky to bet on.  In contrast to a standard middle, you will make a profit if the total or line falls inside a certain range, an inverted middle, also called a Polish middle, you will profit if the total or line falls outside a specific range. If the “middle” in an inverted middle occurs, you could lose both your bets, hence causing severe damage to your bankroll. Learn all about inverted middles in the Ultimate guide to sure betting.
Basically, when betting on inverted middles, to obtain a profit you want the Asian Handicap or the Over/Under to fall outside of the middle.
Polish middles are the most dangerous type of middles as there is a risk you can lose both of your bets, but there is of course also a chance you will profit. This is a form of betting on the opposite of a negative middles strategy. Rather than slightly losing money each time until eventually getting a big win, you win a high percentage return on your stake almost every game until you won’t.  As an example, you might win 15% every game, and then suddenly take a 100% loss.
This method is more related to gambling than actual arbitrage betting. However, it could be a really profitable investment because there is a high percentage of profit. It will be a  benefit if you have skills in regular football betting to know what are the abilities of the teams and to know which Polish Middles condition is more probably to happen. That being said, do not bet on inverted middles if you are not 100% sure of what you´re doing. It is only recommended for very advanced sports traders who have high enough working capital to withstand a total loss on a bet. If you are new ti sure betting, your bankroll can be compromised by a Polish middle.