The bar chart moving averages values are 4 (red), 9 (blue), and 18 (grey) and are based on the closing prices.
Daily -- 4 Days, 9 Days, 18 Days
Weekly -- 4 Weeks, 9 Weeks, 18 Weeks
Monthly -- 4 Months, 9 Months, 18 Months
View more information here: http://futures.tradingcharts.com/legend.php?cbase=A6&cterm=