Trailing Stop EA request

Hello dear friends and colleagues, I'm looking for a trailing stop ea which automatically places a fixed TP and SL, but what I need exactly is trailing should stay at same distance ( gap) between Price and SL at all times. So far closest match I've found is Quick Trailing, actually according to settings of this ea it should work fine for me but it don't, I've tried it. In a beginning it works flawlessly but after a while the gap somehow getting smaller, for an example if I place 20SL and start trailing from +1pip with 1point step, my SL becomes 19 and so on, but this gap at some point getting smaller.

If any of you knows similar ea. please post it for me in this thread or post a link.

Thank's in advance!