Dear brethren: "If the ducks are quacking feed them!" "The quiet before the storm..." I am not sure about how the old maxims relate to range contractions and expansions... After reading here and there some ideas about the ORB system, and how it's so popular among mechanical traders and fund managers, it sounds like it's tailed to the mechanical approach as it can easily be translated into software language. Murphy's golden rule: "Whoever has the gold, makes the rules." Given that a used copy of Tony Crabel's book is worth $1,450.00 and the method seems to be used by most funds nowadays, we might dismystify it here on E.T. After all, there is no holy grail, is there? So, for starters, are range contraction/expansion new words for old things? I mean, obviously no one want to buy a top or sell a bottom. Yet, if you want a computer make the trading for you, you have to give it specific commands. Say, if the range has expanded too much, don't buy it or sell it, exit positions. If we have seen a contraction recently, be on the lookout for a range breakout, and so on... On the other hand, will this verbiage help an old timer, discretionary trader, or is he going to discover new words for things he can instinctively grasp from years of practice and observation? Also, aren't the range contraction or expansion readings already translated into traditional technical information, derived from price, volume and open interest? OPC P.S.: The purpose of the thread is to generate discussion about the method, not among members.