How do short positions affect my portfolio score?

For the same asset, a short position (or if you sell) will have the inverse effect on your Portfolio Impact Score of a long position (or if you buy).

In other words:

If a long position shows a low alignment level with your impact values, a short position in the same underlying might show a High alignment level with your values.
If a long position shows a high alignment value with your impact values, a short position in the same underlying might show a Low alignment level with your values.

How do I sell a stock short?

How do I short a stock?

Can I hold both short and long positions in the same instrument simultaneously?

Where do I mark my order as a Sell to Close?