
0
Not a bug
Show collection value over time instead of just today
Looks like this was a feature at one point but now it seems busted. I've been a pro subscriber for 3 days and every day my collection value only shows one point on my graph :(
This says the feature was implemented. https://pricecharting.userecho.com/communities/1/topics/169-chart-the-historic-prices-for-my-collection
Answer

Answer
Not a bug
The historic values are tabulated every 7 days and the chart is updated. After a week you will start seeing those historic data points and then every week after that.
Customer support service by UserEcho
The historic values are tabulated every 7 days and the chart is updated. After a week you will start seeing those historic data points and then every week after that.