CL Value seeks to reflect the card's current market price. It is determined by anchoring the card's "last sold" value to the player's total market index. As the index fluctuates from day to day, so does the card's CL Value. The Card Ladder Value also has a confidence meter attached to each value on a scale of 1 to 5. The more recent the "last sold" value, the higher the confidence level.
The CL Value can be found on all profiles in the Ladder like the example below.
The Card Ladder value can also be seen on a sale found in Sales History using the same methodology as for the Ladder verified cards like the example below. Here you can see the sale isn't verified but you can still use the CL Value data point as a starting point for what this card might be worth today.
For further explanation please read our White Paper on this topic.