It should pretty much explain itself.
There are two ways to fetch this graph, the first is http://ff.asbjorn.it/chart.php. The other is http://ff.asbjorn.it/chart-[w]x[h].png, were you should replace [w] and [h], with appropriate values.
Its now also possible to use the "[s]-[w]x[h]-[p].png" format, which mod_rewrite will convert to "[s].php?w=[w]&h=[h]&[p]".
width in pixels
height in pixels
upper y axis in millions
default: the next 10th million + 1 million
lower y axis in millions
default: the privious 5th million
time window in frames of 5min each
default: last 4 weeks
future time window in %
should FX release dates be shown on the graph? (Yes = 1, No = 0)
goal in millions
show trend line? (Yes = 1, No = 0)