[gazuz]

I know how to do this manually but I can guess how to program this (without any coding language)

Name each trade 1,2,3,4 as they start and the numbers reset as the lots go back down to the first. program so that the number 2 has the trailing stop.

How are your trades opened though? do they have a fixed amount between each one? if so you can probably bypass the whole thought of using the medium price