Calculate Percentage of a Trade Day

gistfile1.txt

function getTradeDayPercent() {
  // calculate the percent of time passed since trade opened in sydney
  gmtoffset = (new Date).getTimezoneOffset() * 60 * 1000;
  now = Date.now() + gmtoffset;
  today = new Date(now).set({hour: 0, minute: 0, second: 0});
  midnight = today.getTime()
  hour = parseInt((now - midnight) / 1000 / 60 / 60);
  if (hour < 17) today.addDays(-1);
  gmt5 = today.set({hour: 17});
  return ((now - gmt5.getTime() + gmtoffset) / 864000);
}