I added the "volatility" in percent
(High-Low)/low : http://www.mataf.net/en/analysis-volatility.htm
But I think it's not important, most of traders buy and sell 100k contract. The variation in pip or $ seems most important.
(excuse my poor english)
It mean that Euro Dollar moved in a daily range of 48 pips yesterday. In a daily range (average) of 83 pips during the last 5 days...etc
It's the average of daily range ;) not the total range of 5 days
edit: late apex was faster ;)