In Manual mode, the system calculates the prize’s probability based on a ratio you enter. The probability will stay the same regardless of a prize’s remaining inventory. In the example below, we’ve switched out the water bottle for a Rolex Watch. Since this prize is much more valuable, we want to make sure the chances of winning it are very low.
Even if there were only 100 pens and 1 t-shirt left, the chance of winning the Rolex is still .0001%.
In manual mode, you will see two columns, the Prize Inventory and the Probability Inventory. The Probability Inventory will set based on the numbers you enter just like Automatic mode, but it will not change as users win prizes. To adjust the chance of winning, change the ratios in this column.