Hi kerosam,
I use Etrade too. They have something similar to a stop loss but call it a 'Conditional Order'. Basically, you can buy or sell stocks when certain price or volume conditions that you specify have been met. They have basic, intermediate and advanced level conditional orders that get increasingly more complex, so you may want to look into it rather closely.
To find out all about it, click on the 'Trading' tab after you log in to Etrade and you will see 'Conditional Orders' in the menu to the left of your screen.