Adam4Eve collects price information from the market orderbooks via CCPs ESI API every 15 minutes and records the lowest sell/highest buy order prices. At the end of the day the price ranges for that day are calculated and stored as a price history.
Thus the data made available here is NOT the official price history data from CCP via the market history API endpoint, but a self-gathered price history based on the actual orderbooks during that given day.
Additionally the data made available here is aggregated on regional level. Thus corresponding to the level of detail of the official endpoint. However A4E offers data on station/structure level, too.


** type_id **
The CCP/ESI ID of a tradable type/commodity. See https://static.adam4eve.eu/IDs/ for a list.

** region_id **
The CCP/ESI ID of a region in space. See https://static.adam4eve.eu/IDs/ for a list.

** date **
The date on which the data was captured.

** buy_price_low **
This is the lowest price that was seen as the highest buy orders price point within orderbook pulls during that day.

** buy_price_avg **
This is the average price that was seen across the highest buy orders price points of all orderbook pulls during that day.

** buy_price_high **
This is the highest price that was seen as the highest buy orders price point within orderbook pulls during that day.

** sell_price_low **
This is the lowest price that was seen as the lowest sell orders price point within orderbook pulls during that day.

** sell_price_avg **
This is the average price that was seen across the lowest sell orders price points of all orderbook pulls during that day.

** sell_price_high **
This is the highest price that was seen as the lowest sell orders price point within orderbook pulls during that day.