Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of security software firm VirnetX (AMEX: VHC) popped as much as 12.8% again today but ran out of gas around noon Eastern time.

So what: Volume is again at nosebleed levels of 4.3 million shares, more than six times the daily average, and we have more than two hours left in the trading day. The incredible move we've seen over the last four trading days was given some fundamental legs by a great piece from Seeking Alpha pointing out the intellectual property value in this stock. The company recently opened its technology for licensing for companies to meet 4G LTE specifications and should see a flood of cash in the future.

Now what: The long-term prospects look strong for VirnetX but the short-term trends are what worry me today. The five-day chart looks like the slow climb to the top of a roller coaster with investors throwing their hands in the air for the ride down at noon today. I'll sit on the sidelines for now hoping for a better entry price at the risk of missing out on another ride higher.

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Fool contributor Travis Hoium does not have a position in any company mentioned. You can follow Travis on Twitter at @FlushDrawFool, check out his personal stock holdings or follow his CAPS picks at TMFFlushDraw.