I understand now, everyone—this is an operational issue.

Suppose a places an order, then b places another order, and you place an order for b. When placing it, there are take-profit and stop-loss settings where you enter the price levels at which you want to exit.
What you’re unsure about is whether, when entering those settings, it will automatically close all positions, including a’s, or only b’s positions, right?

It doesn’t involve a, and a has nothing to do with it. b is b. Also, when placing an order and setting take-profit and stop-loss levels, are there options for partial and full closure? I didn’t pay attention. I only know that for filled orders, you can distinguish between partial and full closure when entering the settings again.
Is that what you mean?