Your comments about your results implies Flightaware evaluates our positions on roughly an hourly basis. At the top of the hour, we will likely see ourselves in the 30 day evaluation graphic. The hourly evaluation becomes our graphic display rank for the next hour period. My educated guess based on years of software development and database work is Flightaware has to simplify the overall web page operation to keep the web pages working reliably. This is speculation on my part. Recalculating every position for all the users every time you and I visit our site page would be very demanding. The web pages would be slow to load for everyone if recalculation was done. Web sites are a compromise between rapid response, CPU resources available, and coding complexity. I think Flightaware has given us a reliable workable interface, fast response, and It always works.