Trailing stop implementation

Task: Implement Trailing Stop Loss in the Expert Advisor

Objective:

1. Add a trailing stop loss feature to the EA that will dynamically adjust the stop loss as the market moves in a profitable direction.
2. The trailing stop should:
   • Start moving the stop loss only after a specified profit level is reached (trailing start).
   • Adjust the stop loss at predefined intervals (trailing step/width).
3. Visually display the stop loss as a red horizontal line on the chart when the trailing stop is activated and continuously update it as the stop loss moves.