When to sell my BA position?

I bought 9 shares of Boeing (BA) back in October at $132.

Today its around $203.

It's still a short term position since it's only been a few months, so there would be a fee associated.

My question is, when might be a good time to sell? I'm not really sure what to look for or what variables to consider (generally speaking, not necessarily with the company itself).

Thanks for any feedback.