On the Difficulty History page, you rightly have a time frame for the history adjustment graph (All time, 8 year, 4 year, 2 year, 1 year). However, the selection of the time frame does not affect the graph for "Difficulty delta as a percentage. Can you please make it so that these same Time Frame buttons are available for the percentage graph. I would recommend the buttons be used for both graphs as I can't imagine people require different time frames. In that case, pull the buttons out of the first graph div and place them above both graphs or combine divs.
On the Difficulty History page, you rightly have a time frame for the history adjustment graph (All time, 8 year, 4 year, 2 year, 1 year). However, the selection of the time frame does not affect the graph for "Difficulty delta as a percentage. Can you please make it so that these same Time Frame buttons are available for the percentage graph. I would recommend the buttons be used for both graphs as I can't imagine people require different time frames. In that case, pull the buttons out of the first graph div and place them above both graphs or combine divs.
My 2 cents.