Oscar's Grind is a betting strategy used by gamblers on wagers where the outcome is evenly distributed between two results of equal value. It is an archetypal positive progression strategy. It is also called Hoyle's Press. In German and French it is often referred to as the Pluscoup Progression. It was first documented by Allan Wilson in his 1965 book,The Casino Gambler's Guide. This progression is based on calculating the size of bets so that in the event of a losing streak, if and when a same-length winning streak occurs, a profit is obtained. The main concept is that there are periods of many wins and periods of many losses. Losses and wins often come in streaks. Ideally, bets are kept low on losing streaks and increased on winning streaks, which hopefully will follow.