His mind doesn't know how to process what he is seeing. Last week, traders and investors woke up looking at the world with a completely new set of eyes. The precious fractions they had gotten so used to were suddenly turned into decimals. As of Monday, April 9, when the Nasdaq decimalized, we have a different market dynamic. Stocks are perceived differently today than they were the previous Friday.
Perception is how one sees with their eyes, based on their own internal make-up.
In this example, the total incremental move was about one dollar, in five moves representing six levels. Each time the stock moves up, or upticks, one increment, something occurs in the mind of a trader. Once the stock upticks once , the trader starts to get excited and adrenalin flows in greater increments, right along with the stock. As it moves up two increments, the pressure gets stronger and excitement grows. XYZ is bottoming at 20 x 20.01.