For FFA games, this widget shows the total metal possessed by each allyteam, along with its percentage of the total (so if ally 1 has 1000, ally 2 has 1000 and ally 3 has 2000, the widget would display 25, 25, and 50). For normal team games of just two allyteams, it does the same thing as for FFAs and also prints the natural logarithm of the ratio of the two teams' assets (ally 0 / ally 1); for example, if the two teams are even, the ratio is 1 and the logarithm is 0. (I display the logarithm so it's clear to me that a ratio of 0.5 is the same as a ratio of 2 except favoring the other team; with logarithms, one is just the opposite of the other (- ln 2 vs. + ln 2).
Press CTRL to display the information. The widget is very rough, since I wrote it for myself. In particular, there is no way to change where it displays the text, and it displays the value of ln (ally 0 / ally 1) even in FFA games, where it is not very useful.
How do you tell which team is which? (It only displays the allyteam numbers, which are not shown anywhere else ingame.) For team games (at least for those hosted by SPADS) the allyteam with team 0 in it is allyteam 0. For FFA games, it's unfortunately very hard to tell. Maybe somebody here could come up with a solution

EDIT: Actually, in 1v1v1 FFA games, I think the allyteam number is the same as the team number; it's in 2v2v2 games where it gets really confusing.