Simple's Green Room

[Qui-Gon Kagi]

I have often seen price make sudden fast jerky movements one direction before it really takes off and I'll bet that's what you're referring to when the bid/ask lines get "nervous". More often than not it does mean that price will move in that direction strongly as if the horses are getting excited in their gates to break out and race down the course. I'll be paying attention for that "nervous" bid/ask action now, especially to see if it's occuring at the same time that price action starts to get all jiggly before making it's move.