How long does it takes to the market history resets?

Question

I'm curious, how long does it take to reset the market history? For example, if I sell my Shield of Honor today, how long this transaction will be visible in the history of this item? 

Answer 1

If you're talking about clicking on the Market -> My Offers -> Offer History: "Here you can check your last 600 (sell and buy together) sell and buy offers. You can see when the offer ended, how it was ended and for which price you have sold or bought an item.

If you search for x item in the Market -> Details: If you click on this button, details of the selected item are displayed in the upper part, among others the weight, a possible description or if available the vocation and the level by which the item can be used. In the lower part, you find interesting statistics of the item of the last 30 days. Here you can learn about the average price for which the item has been offered or sold. You can also see how often the item has been offered and successfully sold. Furthermore, the highest and lowest price which somebody has paid for the item and for which the item had been offered is shown. Note that statistics are updated only once a day during server save."

Source: Tibia's Manual- https://www.tibia.com/gameguides/?subtopic=manual&section=controls_trading#market

Answer 2

It is not counted in time. On my main char I have about 6 months on my historic, but with a noob character that I do not use, I have historic since 2011.

I counted and I have 450 records on each historic in my main char.