Adding trailing stops to back test systems

Hi

New to forum could anyone help with this please


I have trial version at moment and hoping to register with Amibroker, however first trying to work out how to back test, is it possible to add a trailing stop onto system to test, i.e when R*2 is reached make maximum loss 25% of profit then when r*3 15% and R*4 5%.

Does anyone know if this is possible and how to go about adding it


thanks