Upload/Download speeds

So what the heck is that image, and how did you generate it?

This image is generated every 2 hours through a very strange sequence of batch files. I use my home automation program for the scheduling, although it could just as easily be scheduled using Windows' Task Scheduler. I can't remember the original source of the batch files I found. Basically, what it does is whenever it runs it generates 2 small FTP scripts. The first downloads a file from a certain FTP site. The second uploads a file to another FTP site. The output of the command-line FTP program includes a line that shows the transfer rate. These lines are appended to a text file that has the date and time and then the rate. Finally, it uses a program called ploticus to read the text files and generate a PNG output file. I'll have to upload the batch files all zipped up at some point.