How To Play - NBA Stock Exchange
 

Setting Up Your Roster

In order to get credit for a player's on field performance, you'll have to place him in a starting position at least 5 minutes before his game begins. You cannot sell players in starting positions from 5 minutes before his game starts until the opening of trading the following day. In the event that you just purchased the player on the day of the game started, you will not be able to sell the player until the opening of the market two days later.

To set your line-up, go to your roster page. Under the column that's labeled edit, you will see several drop down lists that will allow you to switch between a bench spot (BN) and one or more of the starting positions (PG,SG,G,PF,SF,F,C,FC, UTIL). Use the drop down list to set your starting line-up and then click one of the "Update Roster" buttons to save the change. After that you'll start to earn points based on your players' on the court performance.