title: Open date strategy variable
body: <p>sorry my english. Im not native speaker.</p>
  
  <p>Hi all, i have a dude about stops in Pine-script.</p>
  
  <p>I'm tring to make a specific trail stop in my strategy script.</p>
  
  <p>I want to make a for loop to evaluate all candless from open strategy date until today.</p>
  
  <p>Has pine-script any variable which contains open position date or number of days or similar thing ?</p>
  
  <p>thank you very much.</p>