A price change is not self-explanatory. The same two-cent move can mean three completely different things, and telling them apart is most of the analytical work.
Information
A lineup is posted, a starter is scratched, weather turns. Information moves are usually fast, usually happen across many books at once, and usually stick. In baseball, scheduled lineup releases are the single most predictable repricing trigger.
Money
A book takes a large or well-respected bet and adjusts. These moves often start at one or two books before spreading, which is why the order in which books move carries information that the final price does not.
Risk management
A book is over-exposed on one side and shades the price to attract the other, regardless of what it believes about the outcome. These moves can look identical to information moves and mean nothing about the true probability.
Reversals
A market that moves and then retraces through its starting point is usually telling you the first move was wrong, was a limit adjustment, or was a single bettor rather than a signal. A reversal is a reason to lower confidence, not to act faster.
Note
Movement speed matters as much as direction. An edge that takes an hour to appear is a different object from one that appears and disappears in ninety seconds, even if the price change is identical.