Options to be explained.
Trade Settings dialog window contains options that concerns parameters of the trade orders.
You can open Trade Settings window from a menu bar button on Strategy tab or from Strategy → Trade Settings main menu command.
Possible values: Bid, Ask, Close.
Default value: Close.
See these discussions for comments about Close option:
Limits 1 - 15 seconds. Default value 3 seconds.
This option is selected by default.
Default value 5 points.
Default value 10 points.
Default value 400 bars.