Roald & Sons Consultancy

The merchant’s handbook

OSRS Grand Exchange guides and calculators

Understand margins before committing your gold. These guides explain the assumptions used by the live trading desk in plain language.

Fira’s live Market Pulse

See current data-led candidates and noteworthy hourly movement, then share an exact item insight.

Grand Exchange flipping guide

Learn the complete buy, sell, tax, liquidity and risk workflow used by Fira.

GE tax calculator

Calculate tax, post-tax proceeds and the break-even sale price for a taxable item.