The open positions indicator 
is displayed when you have an open position for a security. This indicator will be visible when you enter the security into the symbol lookup field, or if your watch list contains that security. When you type the symbol into a symbol lookup field, the open positions indicator will appear automatically in various windows including:
- Order entry
- Options
- Level 1 and 2
- Time and sales
- Watch list
- Chart
For example:
To close a position, click the open positions indicator in any of the above windows.