title: How to tell if you are filled in MQL4 order?
body: <p>I can't for the life of me how to tell if a pending order that has been sent and you have gotten a valid ticket, is filled in MQL4</p>
  
  <p><a href="http://book.mql4.com/trading/index" rel="nofollow">http://book.mql4.com/trading/index</a></p>
  
  <p>Is there a callback or, does a script have to continuously poll somehow?</p>