Determining whether a movement is mean reverting

What characteristics would positive or negative momentum have to indicate that this is not movement to a new level, but ultimately a mean reverting cycle (in the short term)? Ultimately would like to come up with a view on the likely duration of the cycle (how strong and how long).

I have not fully studied this, but would look at the following:

• volume in the buying or selling relative to historical for the time period as well as recent
• lack or presence of news event
• speed of ascent / descent (how do we distinguish period aggressive execution from sustained)
  
• changes in complexion of order book