Chose a specific position to sell with alerts

[Pro85]

Hi

I use PRT and will be buying and closing positions using alerts with an associated triggers. Sometimes I will buy multiple positions for different purposes and I was wondering how to make sure the "right" position closes when I associate a sell order with the alert?

Let's say I already have 1000 shares of a stock that I intend to keep for at least another few months. While I have this position open I decide to buy another 500 shares of the same stock that I only intend to keep for a few days. I can see in my portfolio that the positions are separated from each other so so far everything is good. Now how can I make sure that when I after a few days put an alert with an associated sell order of 500 shares that it sells only the position that i bought recently? Would PRT know what position to sell because the number of shares that I specified are the same? Would it for example sell my longer term investment if I would have associated a trigger to the alert to sell 1000 shares?

Edited January 13, 2021 by Pro85
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[Pro85]

I have now tested different ways to sell on the demo account and I couldn't find a way to do it. It always seems to sell the oldest position first. In the the end the best way to "fix" the issue was to simply open a second CFD account for my short term trading.