V.B.
The streaking is perfectly normal. My 4yo daughter will still do it if I would let her. When we get home she will take all her clothes off and run around in her panties. I figure as long as we are at home (and the curtains are closed. lol) then it doesn't hurt anyone. But I don't let her run around 100% naked.
You may also want to consider that your daughter is not ready to be potty trained yet. I would give her a little more time. It's amazing, but when THEY are ready the just do it. My daughter was 3 before she became 100% potty trained. So to be honest, I wouldn't worry about either the potty training or the streaking. It's normal. Give her some more time. :)