[jdmichal]

I like the idea of using a color signal to show a changed value, with the change cascading to lower "digits". So, for instance, if the GB change, then so do MB, KB, and B. If GB and MB remains the same, then only KB and B will change.

Hard part would be how to do this over a long span of columns without the whole thing looking like a unicorn puked on the chart...