The organised bar plots visualise the artist's works' average value and sales volumes through the years in the auction market.
The organised bar plots, referring to the Z plan, visualise the artist's sales volumes in auctions through out the years; the red line, referring to the X plan, represents the average price of the artist's sold works and its trends over time.
This graph clearly visualises the artist's trends in the auction market, in terms of the evaluation of his works and also of sales volumes.
|Frank StellaVolumes & Average Prices|
|Year||Volume (in US$)||Sold lots||Average (in US$)|