Quote from dbphoenix:
I can't define "chop" for anybody else, particularly since it must be detected in real time. However, there are two relatively distinct types of "chop" that can be perceived in close-to-real time. One is the directionless sort with bars that are heavily overlapped. It's not quite a trading range, but it's not going anywhere either. One might also think of it as wide-range congestion. The other consists of a series of higher highs and higher lows, or vice-versa, which then reverse back down (or up) to what is not yet but might become a trading range. This is not exactly chop since price does have a direction. But the stride is aborted and price reverses back into territory that it already covered.
For example, this morning, price had been in a long downmove that ended at 38. It then made a series of higher highs and higher lows almost up to 43, followed by a double top. It then reversed and declined to test the swing low at 39.5, after which it took off a minute before the open. This to me is not chop but something that is telegraphing information that is tradeable. Granted it may be outside the simplicity of this thread (or simple-mindedness), but it does have to do with "chop", which is very much an issue for those to whom these lines are something new.
There is also of course the old saw about closing up shop once one has had two losing trades in a row. However, it appears that the same impulse which drives some traders to trade chop also prompts revenge trading, and the stop after two losing trades advice is pretty much wishful thinking. Giving someone criteria other than two losing trades may help them not only to stop but to avoid revenge trading. We'll see.