formula for Stop loss

I need some help with this one. I am trying to use a formula to determine the stop loss using a variable so I can optimize for the best setting.

The code for a different platform looks like this:

Stop = (HH(2) – LL(2)) *variable

HH(2) is the highest High from the last 2 bars. LL(2) is the lowest low. I can seem to figure out how to do this with EA wizard.

Thanks for any help.

in EA Wizard there are functions (in Custom Indicators) [b]Highest[/b] and [b]Lowest[/b] – they return highest high or lowest low of given period of bars.