Stock Market PvP

[Grieve]

(if we sell on a day when the market is closed, do I need to wait for the end of the day next Monday?)

Yup.

In retrospect, I probably should have said, if you make a trade BEFORE the market close, you get the price at the END of that day, and if you make a trade AFTER the market close, you get the price at the START of the next day. But I was really trying to discourage too much trading...