Trailing stop needed for EA

Hello,

i bought an EA which hasnt a trailing stop. Source Code not available. Ther magic number could be adjusted, the comments are fixed.

Following Inputs and functions

Magic Number: Filter which EA and trades should be trailed (If you have other and better method, no problem)

Trail Start: At which leve the trailing should start

Trail Distance: When Trail Start then the SL should be placed at this level

Trail Step: When price moves a step it will be trailed with such step

Example:

Entry level: 1000 SL: 9900 Trail Start: 100 Trail Distance: 50 Trail Step: 50

Price moves up to 1100: SL 1050

Price moves further to 1120: SL 1050

Price moves to 1150: SL 1100

If Trail Step is 0, continous trailing