Magic Numbers and Comments when submitting orders (EA or manual)

Does anyone have a good use for these? The only thing I can possible think of using Magic Number for is for going through open orders and matching them up to current symbol (handled just as well w/ OrderSymbol()).

In my coding of various EA's, I always run accross the situation of "what do I need these for" or "what could I use them for".

What has everyone else used them for?

Thanks.

Different exit strategies based on the entry strategy used to open the order. If you have an EA that uses 3 entry strategies, and the exit point are different depending upon how you entered. Also if you have different exit strategies you use depending upon when the trade was entered. Say a 10 pip TSL if you are past the first daily pivot, and a 25 pip TSL if you haven't reached any pivots yet. Also if you run more than one EA on the same account, you can make sure they don't interfere with each others orders.

thanks.