The price point at which the number of potential customers who view the product as either too expensive or too cheap is at a minimum is known as the Optimal Pricing Point (or the Penetration Price). Here, the number of persons who would possibly consider purchasing the product is at a maximum.
PSM2 Fig. 2: Optimal und Indifference Pricing Point
The Indifference Pricing Point (also called the Perceived Normal Price) is the point at which the number of persons who view the product as being good value is equal to the number of persons who view it as being expensive