The Ability To See When Item Was Added To Your Collection/See What Decreased Or Increased AND Percentage Of Total Value

on the value graph chart, you can see that the value goes up and down, lets say on 4/22/26 i add a hundred coins, later in the future when i look at the graph, 4/22/26 is spiked compared to previous dates, by hovering over that spike, it would say "these things were added which changed to value from XXX to XXX by XXX%" 

whenever the total value goes down it says "-XXX%" or "+XXX%" saying what increased and what decreased