You can set it any time. It will only start applying when the trade is open and the PS sees the given level profit. It will apply to all trades on the same symbol and with the same magic number as is currently set in the Position Sizer's Trading tab.I have another question about the "Trailing stop" and "Breakeven" fields in the TRADING tab.
Let's say I want to move my SL to break even when the trade is XXX points in profit. Do I need to specify this when I set up the limit order already (trade has not opened yet). Or can I still set this when the trade is already running?