On January 24th INVN showed the great hourly volume in weeks during the last hour of the day.  By the end of the next day it was very clear that that "Heaviest" volume was not moving the stock higher.  So why stick around to see how far it will fall???  Checking the intraday charts may seem daunting or like "noise", but keeping tabs on the 3 or 4 heaviest hours in the past five to ten days will clue you in early to a change in trend.