I’m not familiar with pricing performance measurement. Search in Google for some details, but this term seems not to be used much.
I assume the question is about measuring if the product is priced well for the selected segment? In this case I’d start with measuring total profits over a period of time. E.g. your product might be priced higher that the product of your competitor’s, you will sell less units, but the total profit will be higher.
It makes sense tracking this for a period that is 3-times longer than average purchase decision in your industry.