Noticed the treasure chest that you can find when you sign in to the game

What can you do to take advantage of this? If a specific announcement is made, look at the products being advertised, determine the items and items that are required and attempt to stock up prior to prices rising. After the event has begun an increase in demand will mean that you'll be able to sell your excess stock. In the hope that supply doesn't exceed the demand, and OSRS gold prices are much higher than they were before you purchased the goods.

Hope we've managed to teach you how to...