You can enter a position to analyze by clicking on ‘Ask’ for buying or ‘Bid’ for selling. You can also directly enter the quantity in the entry box. (Note: make sure to indicate a selling position with a minus (-) sign).
For positions that include the underlying stock, such as Covered Calls, Protective Puts & Collars, enter the stock quantity in the upper right corner of the chain window.
You can change the click quantity amount by changing the default-click parameter (found at the top of the Option Table) for 1x, 5x or 10x.
