How to modify mt4 indicator

hi everyone

i was wondering if any body can help me. I have an indicator which is basically a regression channel with a deviation of 2.0

i have put it in to meta editor so i can add en extra two line to the indicator that are around 2.6 and if possible remove the centre line.

after many failed attempts its seems i cant figure out how to do it so i need your help please if possible thanks