Ladder Score (or simply Score) ranks cards according to their 14-day trend.
The formula sums a card's (1) daily dollar change, (2) daily percentage change, and (3) transaction volume to produce the card's Ladder Score.
The formula is: (Last sale w/in last 14 days - First sale w/in last 14 days)/10 + ((Last Sale w/in last 14 days - First sale w/in last 14 days) / First Sale)*100 + (Quantity sold)/10.