modify existing expert advisor

this is ea with trailing stop;3 std indicators;and stop [login to view URL] take [login to view URL] trailing stop change only;i want put in input with just one change.i want trailing to set stop loss with % in pips. i.e if trailing sl is 25 pips;when it reaches 50 pips;it sets stop loss %.say if 20 %;it then would set 40 pips.(20%=10 pips).another [login to view URL] trailing sl is 50 pips; % input =10%. when 100 pips profit is [login to view URL] goes to 90 pips.(%10).this input is because too many trades lose half of big profits in pips as ea is coded to do.i.e generally loses 50% of total as [login to view URL] the trailing will just continue as normal with trailing preset and increase if profit [login to view URL] again in [login to view URL] [login to view URL] sl 30;when 60pips goes back 30.sl= 30 pips. with new input(say 20%)trail sl [login to view URL] goes 60 pips- double;then sl is set to 48pips (20%)instead of 30 pips normally. stop loss stays same; until trailing sl starts like ea normally [login to view URL] trailing continues to increase with %input sl increases as well. ## Deliverables 1) All deliverables will be considered "work made for hire" under U.S. Copyright law. Employer will receive exclusive and complete copyrights to all work purchased. (No 3rd party components unless all copyright ramifications are explained AND AGREED TO by the employer on the site per the worker's Worker Legal Agreement). ## Platform mt4 platform. must know mql language.