Adding smart trailing stop to my EA

I need a sharp experianced programmer, at creating more profit for this EA

by adding trailing stops, when the EA would have closed the profitable orders anyway.

trailing should start where the EA would have closed the order otherwise

when trailing starts the EA should see the order as closed and continue it's work.

this is a grid multi order EA

i need advice on how much the trailing distance should be, should it be fixed or custumized for each pair?

any idea's for more profit for the EA is welcommed.