It is something more or less like that:
10001:q_lo,q_md,q_hi,p_lo,p_md,p_hi,health,sold
10001:2,3,9,290812,436972,438200,0,0
item id 10001
lowest quantity posted on ah within last week 2
median of quantity posted on ah within last week 3
highest quantity posted on ah within last week 9
lowest ah price 29g08s12c
median of ah price 43g69s72c
highest ah price 43g82s00c
health - item health, dnno about this one, but they must have some algoritmh to determine if item is selling good, like amount of items on ah vs sold items 0
sold - how many items sold probably within last week 0