Limit Order question

[kimchi]

You first need to think about why you want to buy a market and what your reasons will be for selling. Then you should consider what your trade objectives are (long-term or otherwise. I don't think you're investing). Your stops should be placed so they meet your objectives.

This is somewhat more difficult to do retrospectively with a trade in progress.

It's a huge topic which can't really be addressed here or from your info. I'd suggest reading up on stops and exits.