One of my systems is a day trade system; enter on the OPEN and exit on the CLOSE. It signalled two trades today (perfect setup conditions for the strategy), so positions were duly entered.
The positions performed appropriately.
Time to close the positions...start up the trading platform at 3:30pm...that's strange...no trading action since 2:30pm.
Not exactly the very best time to have large open positions or to forget that the ASX closes early on the day before a public holiday.
(For anyone reading this down the track who doesn't realize the significance, 'tis Thursday and tomorrow is Good Friday).