# About and sources

> OSRS Grand Exchange is a free, unofficial fan site for Old School RuneScape traders: live prices, our own price history, market movers, money makers and calculators.

Canonical: https://osrsgrandexchange.com/about

OSRS Grand Exchange is a free, unofficial fan site for Old School RuneScape traders: live prices, our own price history, market movers, money makers and calculators. It carries no ads. We also make weekly data videos on [YouTube]().

## Where the prices come from

Every five minutes we read the [OSRS Wiki real-time prices API](https://prices.runescape.wiki/) (latest instant-buy and instant-sell prices, and 5-minute, hourly and daily averages with volumes) and store it in our own database. Since 30 September 2026 that data comes from Jagex for every game client. Our charts, movers and margins are worked out from what we’ve stored, so pages never call the wiki directly.

**Instant buy** is the price of the most recent trade where someone bought straight away; **instant sell** the most recent where someone sold straight away. Margins are after the Grand Exchange tax.

## Game rules we use

- GE tax: 2%, rounded down, capped at 5m per item, none under 50 gp, plus exempt items ([source](https://oldschool.runescape.wiki/w/Grand_Exchange#Convenience_fees_and_item_sink)).
- High Level Alchemy: 55 Magic, 65 XP, 5 fire + 1 nature rune, about 1,200 casts an hour ([source](https://oldschool.runescape.wiki/w/High_Level_Alchemy)).
- Combat level and experience formulas ([combat](https://oldschool.runescape.wiki/w/Combat_level), [experience](https://oldschool.runescape.wiki/w/Experience)).

Rules last checked 2026-10-25.

## Jagex

Created using intellectual property belonging to Jagex Limited under the terms of Jagex's Fan Content Policy. This content is not endorsed by or affiliated with Jagex. Old School RuneScape and RuneScape are trademarks of Jagex Limited. Item icons are Jagex’s own Grand Exchange images. For the official Grand Exchange database, see [secure.runescape.com](https://secure.runescape.com/m=itemdb_oldschool/).

## Contact

[hello@osrsgrandexchange.com](mailto:hello@osrsgrandexchange.com)