When sorting collection by biggest increase in price, it should be based on the date the card was added to the collection on pricecharting.

When sorting collection by biggest increase in price, it should take into account from the date the card was added to the collection on pricecharting!

This can be programmed easy:

1. Record all prices of cards on day it was added to collection on pricecharting (should be easy since there is a built in historic price chart on pricecharting)

2. If present day is Y, record all prices of cards on day Y (should be easy since there is a built in historic price chart on pricecharting)

3. Record the difference, Y-X and sort by largest to smallest

This is helpful for me and for any avid collector because I would like to see which cards have gone up the most since I purchased to maximize my profits when in the mood to sell some cards locally or on eBay. The current algorithm is quite poor in actually filtering from biggest to smallest increase in price alone.